No problem, I've used microballoons forever while building. Although the process of using it with plywood is new to me. Flyrcjoe and I have been chatting offline quite a bit and he got me talked into trying it. It's pretty awesome and I'm looking forward to brutalizing this thing next Summer to see how it holds up. Joe designs and builds HUGE HUGE airplanes and flies the crap out of them so I trust his opinion.
Joe and I are like brotha's from anotha motha (that have never met in person). Have to give him props for his 54% Edge scratch build. He has some stuff in the works and I'm just itching for him to start a build thread here some day. As an example.....his entire 54% Edge fuse weighs less than my Viper fuse with gear installed. I'm building mine so that average Joe Pilot can build it quickly and hammer the sticks thought, so I have to leave a little extra beef in there.