i had the idea as well,thought it might reduce the limpweight a bit.
but than on the other hand,tapering the glasslayer in way that its geting thinner towards the tips isnt a good idea.
it will weaken the tips,and thats a thing i dont want in my bows.
i try to get the last 10" as stiff as possible.
my sugesstion would be,drop that idea for now
and build a dozen bows or so.
if they turn out the way you want them,jump back on your tapered glasslayer design.
first get some experiance and a feeling for the stuff.
shantam