Thats a good idea. If you are able to handle the lower let-off just use the module for the longest draw but let your draw stop at the current position. This will reduce the letoff and give you a longer peak weight so that more energy is stored and you will get a faster arrow.
In genereal Martin will call you back the same day but try further.
I have replaced the rubber cap around the draw stop by something like duct tape from a mechanic i know. It feels kind of smooth and cannot fly off as it is taped...
(2) Martin ShadowCat 2010