@laSoul I did what you said and relocated the fuel in the red parts as well. It flies way better now. It can even takeoff from water (it takes time but it makes it). thanks for your advices :)

@laSoul Nice! Thx. I will try it right now

@Droslash I ficked your problem, the craft is top heavy from the fule you placed in those cylinders, if you want to cope with that, add 1 ton of dead weight on every red bottom piece exept the firs 4 in the front. Should still fly downward but with more control from the weight.

@Droslash You got this man, I belieeeevee

@laSoul Thanks, I did that but my main issue is the CoT. It is higher than the CoM and thus pushes the nose of the craft down. The engines are placed this way IRL so i want to make as realistic as possible. I will continue tweaking the aircraft and see what i can do.

@Droslash Your best best is clicking to show the CoT/CoM/CoL and try to put the blue orb and the red orb as close as you find it stable. Use the weight slider on the blocks and play around until you find something you're happy with! Keep the weight bottom heavy as well :D

@DeezDucks Thanks for the upvote :) Let me know if you have any advices for the build. I am really struggling to make it fly well. I would be glad to have your feedback on this (if you want and if you have time of course).

@laSoul Thanks for the upvote! If you have any advices for improvements let me know it really needs it.