It's been a few years since I brought this up, but the hoaky foam spar extensions that are added to the KR2 spars to make them KR2S spars just doesn't sit right with me. I feel sure that was the result of somebody trying to use spar material (and wood kits) that were already called out for the KR2, rather than structural or common sense integrity. Not that they're not structurally sound (there's not much load out there, but there are plenty of opportunities to screw it up), but just as a matter of keeping things straight. It's hard to beat a nice spar for straightness. It'd be a shame to stick some junk on the end of it and give a joggle or a discontinuity.
If I were building a new KR2S I'd just buy the spar material 12" longer than the plans call for dump the 33" template, going with the next one in line, the 30.67" template at the new end of the spar, and dispense with the foam/glass kludge job. In fact, the AS504X templates already have a phantom spar and dimensions for the spar if it's extended to that point... Mark Langford, Huntsville, AL N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford
