EASY11, Hi, do not think that every thing is interchangable between TAIGEN/TORRO/HENG LONG, I made the mistake of buying a pair of WALTERSONs 3/1 brass gearboxes for my TAIGEN Tiger 1, the gearboxes come with a replacement base plate, unfortunately it is for a HENG LONG Tiger 1 and the TAIGEN base plate will not accept the WALTERSON gearboxes so armed with paper, rule and marker pen I copied the mounting holes and transcribed it to the base of my old service mess tin! Drilled and cut to shape, after a dry run all is well, one new base plate,but I had expected the mounting points to be the same between the three makers Tigers. So check before spending your cash.shaun