So I've managed to get the plate to sit flush on the trackball casing... now the only problem I have is I'm not sure what size carriage bolt/screw I need to fasten the mounting plate to the casing... I know that the length is around 3 inches, but diameter size is what I'm not sure about.
The plate itself looks to be a happ mounting plate (got it at Starburst in T.O.), and it's one of the metal ones that are the flat surface tops (no bolt holes showing).
If anyone has done something similar and has the specs I'm looking for, I'd really appreciate it!
Cheers!
Mike