You must specify this when ordering the switches. The material is easy to work with and you cut the hose to the length you need. The parachute bags conform to the strakes to allow you to stuff the bag completely into the strakes. They will hold a lot of clothes and are available in a number of colors. We'd suggest requesting handles attached to both ends so the bags may be easily pulled in and out of the strakes.
Embroidery is also available.
Props are available for the 360 and 540 Berkut. This is a large marine supply company that is convenient to use for ordering West Systems materials. They distribute from the west and east coasts and have good prices on the materials. This is the manufacturer of this resin system. You can find it at most marine supply companies, as well as Aircraft Spruce and Wicks.