Hi Tony
1- My first p lam was .050 glass on belly of an existing one-piece 64" D/R , Added it after testing,not much if any change in weight, added 2 FPS , think it was 3" past riser fades
2- Depending on what your limb is doing and amount of deflex in riser, less deflex needs more p lam IMO. 3" is a pretty good place to start I think.
3 - Yes it has to be tapered to a feathered end, I usually go full length but you could maybe just go part way.
4 - I really don't think it matters much once glued up , I can't see it making a diff. Need an engineer to answer this one tho...
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