Lol. Inb4 titanium drum for Rango in 2015.

I'm not sure how I could get preload on the bearings differently when they sit behind the discs as they do. Could have used thrust bearings or something between the bulkheads and the faces of the discs, but it's more fuss than it's worth I think, for a slightly wider drum. The clearance is 2mm from the boltheads to the bulkheads as it is, I'd have to use weaker headed bolts to make it wider.

Also the spinning mass will be about 2kg, maybe a tad over, at around 8000rpm. Never intended for the weapon to be the main aspect of the robot, I think Harry described Rango once as a jumped up rambot and that sounds accurate to me. :P