Bowers sez in the plans that you could use 1/16" aircraft grade plywood for the ribs. It would cost a lot more, but there would be noticable weight savings over 1/8" marine grade. Has anyone done this (or seen it done)? Sounds good except when it comes to attaching the rib caps. It would be pretty tough to accurately put nails through the rib cap and into the edge of a 1/16" rib (which what it shows in figure 4-12 of the plans). Am I correct in thinking that the nails only provide the clamping pressure for a good glue joint? If so, if one were able to work up a good way of clamping this, the nails could be done away with? Frank Stutzman only on chapter 4 of the plans