got it relatively balanced enough for VTOL and made the wings stationary so that you have control while going forward with the engines down (if you don't want this you'll need a lot of rcn's). Those fuselage bits in the middle are to bring the COM up to meet the COL. to get rid of this you'll probably need a modded fuselage block with the exact value of weight you want. as it is, it's flying ok but the wings don't actually produce enough lift to keep it in the air when the engines are fully forward (to fix this you'll need to make the wings larger in general). to fly this one you need the engines down enough to create lift. Also you need to play with roll, maybe add roll surfaces to the rear wings as well.