135 resin can be used with the slow hardener without post cure the only spar cap that needs the thread removed per plans is the roncz canard. its very easy to remove, after wetting out each ply, you cut the thread in the middle of the length, grab the outboard end and pull each cut strand outboard. the opposite half of wet out layup will hold the ply in place while you pull out the strand. after it is pulled you squeeze it back down from the center, outboard in both directions.