When I spawn this awesome fighter, there is a message that says that some of the blocks are not available or something. I haven't done any flight or combat testing yet, but when I spawned it despite the message everything seemed fine. I was however curious of the piston that sits just behind and below the cockpit. I can't get a good look at the image you have of the bottom of the fighter, but I suspect that something is supposed to be there that is not spawning anymore. Could you tell me what is is and if it's important to the fighter?

@Time_of_Day Hey, unfortunately I have no idea why that message pops out, everything on the fighter is vanilla.
Pistons in this craft work as "retractable landing gear" so at the end of the pistons there are no other blocks placed

@Time_of_Day Hey Ok, I know what`s missing. Keen "fixed" hipergridded blocks and they are no longer work like before, so the guided missiles won`t be working in auto mode

Update: TO MAKE AUTO-TARGET MODE IN MISSILES WORK MAKE SURE THAT YOU MARKED "ENABLE SUPERGRIDDING" IN THE WORLD SETTINGS MENU