I'll be fixing some good
strong brackets to the insides of the cab control panel shelf, then I'll use bolts through the bottom of the control panel and fix nyloc nuts and penny washers so the bolt heads don't dig into the MDF.... May change my mind yet though. If you've ever seen the Ultimate Arcade II plans then you'll know what I mean, if not here's a
very rough sketch:

hopefully this should work, will save me buying extra hardware.