I am building one of theses and mounted the engine a G-38 this week end. I was wondering if when using a g-38 and a rubber vibration system I had to cut down the mounting block 1 ¼ “ and it is still an inch to long why is no one is talking about that or engine length on the g-38 being an inch to long ?? Also if any one is building one of these DO NOT FLY with the retracks mounted from the factory you can pick the wood they used out with your finger nail!! you will blow out you wing on landing. im geting robart 630 with a 8" strut. $300 ouch well im very thakfull for this forum and all you guys you keep me looking Clint Whitman Valley flyers van nuys CA