This design is flyable now, believe it or not (i’m saying this since it take quite a while to take-off with it), but this design is made to be tweaked on even more for better design or flight experience. the changes that I made are: Main fuselage replaced with fuselage which is turned at the right angle of 45 degrees since the one being used wasn’t turned to that precise degree, making the plane look bent. repositioned the flaps and added new ones. added tails for stability (these are small for such an big aircraft, I suggest if you want a tail make it big, or if you don’t, use a small modded vertical stabiliser and hide it in the back end of the main fuselage). changed the angle of the fuselage parts on the wings to align more properly. added a fuselage inlet so the engine would work (I put it in the nose).