I found out how to mount the gearbox, I think this will be better than using the gws gearbox unless it would be better to use the 6:1 ratio instead of the 4:1?? Is there any way to change the ratio with the pinion gear or is the MP Jet gear box set with only that one pinion usable? I am sure you could by a different pinion to change the ratio.

Here is the mount: