Finished my Twist last night.....put it on the CG machine and it balanced at right at 4.75" behind the LE with NO ADDITIONAL WEIGHT needed! Thanks for everybody's tips stating that the plane builds tail heavy...I was able to counteract that through the assembly process.
I should be maidening it Tuesday or Wednesday. I don't have an accurate scale, but it feels slightly lighter than my Phoenix Fun Star 3D, which pretty much had unlimited vertical with the same engine/prop combination. (TT Pro .46 & APC 12.25x3.75)