RC4WD Gearbox spacer for HG P601

Well, the original gearbox in the HG P601 is a disaster, weak aluminum gears that break easily.

So I got this gearbox (http://store.rc4wd.com/R2-Black-Crawler-Transmission-V2_p_842.html) and was going to try to modify it for the HG P601, the only thing to do is, this spacer I made, drill 4 holes in the gearbox bracechassithing and install it.

The shafts need to be reemed to 5mm to fit the gearbox, I used a propeller reemer, worked good.