I  was standing there with the 2x4's stacked up and it dawned on me, I have something like 200 lbs of diving weights. It was either that or one of the diving tanks to slap on it. The dowels is my own little thing I do, years ago I tried it on my topflite p-47, worked like a champ. So it takes 1 minute to do, but cuts the fiddling factor down to nothing, you can squeeze the parts as tight as possible and they won't shift out of alignment. I would normally use regular wood glue to bond the doublers, but the addition of carbon fiber and kevlar requires epoxy resin, but this is the low viscosity MAS resin, so weight is not all that bad, infact, it's very hard to make a little fillet using it, it just seems to flow out like paint. The other problem I noticed but can't do much about it till later is the fuslage sides are made from lite-ply, the ply has some voids in them, where the inner layer is missing, but that would just be a quality control issue. I will mix up some micro ballon/ resin paste and inject it into the voids here and there.