JHays, nice build, keep up the good work. I know you already have the engine for it, but you might nevertheless consider a little more power so that the up-lines can be a little longer in your IMAC sequences. I have the OS 120 AX in a 10.75 lbs Goldberg Bucker and it powers the plane very well at that weight. It also runs great on cheap 5 or 10 % nitro fuel.