Product review (5 stars): DIY and save yourself a bunch of money
Not much to review here. It's a brass orifice.  The five stars is because I was able to get it on Amazon and install it myself, saving a bunch of money and time.  Allow me to also give one star to LG for not including what is probably a $1 item for them with my $1,100 dryer (as well as not making it easy to find the LP orifice part number in their documentation), and another one star to Home Depot for not stocking a necessary part for the dryer they sold me, especially in a store that is in close proximity to a large number of propane users.

Now to the installation in my DLGX8001. Before I received the orifice, I poked around on Youtube looking for how hard of a job this would be.  I ran across one video that looked like it would be a snap if you went in from the back by removing the dryer vent tube.  Let me tell you right now that having done this according to the instructions that came with the orifice, going in from the back would be a big mistake.  Getting the orifice off and replacing it would be doable, but the video did not discuss the requirement to screw down a vertical teflon screw. Trust me, you would never be able to loosen that screw from the rear.  I hope that was not a necessary step for his model, because he probably blew up his dryer if he didn't adjust it. There was also another video that made it look very easy, but what it didn't explicitly show was that they had removed the entire inner front panel and the drum, which made it very easy to get to the orifice and adjustment screw.

I decided to follow the instructions that came with the orifice, which were ALMOST correct.  There are two additional screws on the front panel that needed to be removed (it's obvious which ones).  I had no trouble following the directions. Be SURE you keep track of which screws go where, because there are two stainless screws that get exposed to water and they need to be put back in the right place.  Note to cat owners - do NOT place them neatly in order on the floor, then walk away and expect them to be where you left them.  Just sayin'...

The only trouble I had with this install is that there really is very little open space provided by the opening in the inner front panel for replacing the orifice and closing down the adjustment screw.  You will need a fairly short open end 10mm wrench for the orifice. I recommend tilting the dryer back to get your hand in there easier. Don't forget to use proper sealant on the threads (there was sealant on the old orifice's threads). I don't remember if the replacement orifice came with any sealant (I had some anyway that was approved for use with LPG).

Once the orifice is replaced, it's time for the really hard part. The large teflon screw is extremely hard to get any torque on with a screwdriver, and it is HARD to break loose if you can't get much torque on it (at least on my unit it was - it could depend on whether you get Hulk Hogan or a little old lady on the assembly line that day). I could not get sufficient torque on my stubby flat blade screwdriver because you essentially have to reach up through the opening to grab the handle and use a reverse grip. If you have a wide-bladed screwdriver with a short blade and long handle, you may be able to loosen it.  I ended up having to find a thin piece of steel about 2" by 1" that would fit in the slot, and I got a lot more torque by putting one side of it in the slot and turning.

So in summary, taking the unit apart and reassembling it is easy-peasy - replacing the orifice and turning the valve will probably occupy the majority of your time spent on this.