1/15 Tiger 1 from Bandai. Surgically transplanted a Tamiya twin clutch gearbox and turret drive. Metal track. Road wheels modified with metal tube bushing. 6 channel radio.
No lah, the problem of this gearbox is that the clutches slip a lot!! especially when they get a little used and old. I may consider converting it into twin motors design by simply adding one more motor and lock up the clutches. However, no matter what, it was a very innovative and tight design. Sloppy engineering though.