Cheers guys, but it looks like the camera is sagging. Top left and right have eggy stars when you zoom in, bottom looks ok so far. Looks like I'll need another custom adapter and ditch the 2" thumb screw stuff
[Edit]
Adding M8 from the other side of meridian. It looks the same to me. More niggilly little problems to iron out
Only 4 x 15minute subs here.