Jonas,
I'm new to this thread but I must say I am really impressed by your effort. I commend you on keeping the AS gun. I won't own a tank that doesn't have a decent gun. I know how much work it can be to tear out the mounting and rotation/elevation gearboxes and come up with a new system from scratch. I prefer a high degree of functionality in my tanks, looks like you do too. You could have just done the cosmetic conversion and still had a great tank.
Keep up the good work