The vacuum booster is another component of the brake system that's housed under the hood. A faulty or malfunctioning booster is the primary cause of a hard break pedal. If you feel like you can't push your pedal down very far or the pedal feels too stiff, the vacuum booster is probably behind it. Test the pedal out to see if the booster is working. Get into the driver's seat and don't turn the car on. Pump the brake pedal 5-10 times. You'll notice the pedal start stiffening up. Keep pressing until you can't push the pedal down much anymore. Don't force the brake pedal down. Press it normally. When you can't press it down with normal pressure anymore, then this step is complete. When you can't move the pedal anymore, press down on it with normal pressure. Then start the car while pressing down. If the pedal releases and pulls back down, then the vacuum booster is working normally. If not, then the booster probably needs to be replaced. If the pedal doesn't loosen up after you start the car, then the brake booster is failing. If you know how to, replace the booster yourself. Get a replacement from an auto parts store, remove the old booster, and install the new one. Otherwise, bring your car to a mechanic to have the booster replaced professionally. In most cars, the master cylinder blocks the vacuum booster. Remove this first. Go inside your car and tilt your steeling wheel all the way up and remove the car's knee blocker. Reach inside and detach the clip connecting your brake pedal to the vacuum booster. Unscrew the 4 bolts holding the booster down from inside the car, then go back under the hood and remove the hoses connected to the booster. Slowly slide it out of position. Slide the new booster in and hook the hoses into it. Then go inside the car, tighten the nuts, and reconnect the brake pedal. Put the steering wheel and knee blocker back into position. Don't try to drive the car until the booster is fixed. Call a tow truck to bring it to the mechanic.
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One-sentence summary -- Check your vacuum booster if the brake pedal feels hard. Pump the brakes a few times with the engine off. Start the engine while holding the brake down to see if it moves. Replace the brake vacuum booster if it isn't working properly.

If you're using a foam saw that's attached to your work surface, you'll be able to move the foam as it's cutting. However, if you're using an electric knife or wire cutter, you should keep the foam from moving while you're cutting it. You can hold the foam with one hand, secure it to the table with clamps, or set the foam in a vise. Ensure that the part of foam you'll be cutting extends away from the clamps or vise so you have room to cut it. Always use caution and wear eye protection when you're using electric cutting tools. If the cutting will make fine foam dust, you should also wear a face mask to avoid breathing it in. To cut through thick or stiff foam (up to 4 or 10 cm thick), stack the foam together. Plug in an electric knife and turn it on before you touch it to the foam. Use the thinnest blade on the knife to make straight or curved cuts. Go slowly through the foam as the electric knife cuts so you get a clean cut. If you're cutting a very soft foam, avoid pushing down while you cut with the electric knife. This can make it difficult to cut or can move the blade away from where you want to cut. If you cut a lot of foam on a regular basis, consider buying a foam cutting saw. The saw is supported by a base that you set on your work surface. The blade runs vertically, so you'll hold and move the piece of foam against the blade to make your desired cut. If you'd rather hold the foam and move the saw, you can remove the base on most foam saws, or use a common jigsaw for thinner foam boards. Plug in a small wire cutter until the wire is hot. Avoid touching the wire. Push the foam through the blade to make straight, smooth cuts. If you'd like to cut more details (such as waves, curvy lines, or circles), consider using a hot wire foam cutting table. You'll be able to select the thickness of the blade when you buy a hot wire cutter. This will determine the size of foam that you're able to cut through.
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One-sentence summary -- Secure the foam to your work surface, if necessary. Wear protection. Use an electric knife. Cut foam with a saw. Heat a wire cutter to cut through the foam.

Locate the seam on the inside of your shorts or strap. It will be located on the front, near the top of the waist. Use 2 fingers on your nondominant hand to open the slot. Slide the cup down through the opening until it's fitted in the bottom of the pocket. The gel lining may make it kind of difficult to push it all the way down. Wiggle the cup back and forth until it slides all the way down if it sticks. With your underwear on, spread the elastic band out and slide your right leg through the band and the hoop on the right. Slide your left leg through the band the hoop on the left. Pull the waistband up and let the elastic bands slide up your legs. Once the waistband is on your waistline, reach behind your thighs and adjust the elastic bands until they're comfortable. If you're new to wearing a cup, you'll probably feel more comfortable if you're wearing boxer shorts underneath. With your underwear on, slide your right leg through the hole on the right. Put your left leg through the hole on your left. Pull the compression shorts up to your waistline so that they're comfortable. If you really want to, you can wear compression shorts without your underwear. Most people wear underwear though. Adjust your cup so that you're comfortable and protected. Your genitals need to be entirely covered by the cup, and the bottom of the cup should rest 12 inches (2.55.1cm) underneath your testicles. Move the cup as needed until it's comfortable. Once you've got your strap or shorts on, take a few steps back and forth. Raise your knees up to your waist to see how it feels. Do a few lunges or squats to get used to the feeling of the cup. Make any adjustments as needed based on how comfortable you are. If you find your cup pinching your skin when you're wearing it, move up a size. You can wash your strap or shorts with your normal laundry. Both the jock strap and the compression shorts will absorb sweat, so don't wear your jock strap or compression shorts for multiple days in a row without washing them. Clean the athletic cup with hot water and a sponge loaded with antibacterial soap. Let it air dry after washing it.
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One-sentence summary --
Slide the cup down into the opening in the middle of the strap or shorts. Put a jock strap on by sliding your legs through the elastic bands. Pull compression shorts all the way up like you're putting boxers on. Adjust the cup so that your genitals are protected. Take a few steps and do some lunges to see if it's comfortable. Wash your strap or shorts and clean your cup after every use.