SRC V3 MP5 Gearbox problem

[Urza]

Hi all,

I'm having a bit of trouble re-building a V3 gearbox for my friend's SRC MP5.

It was given to me in pieces, along with three setc of gears, and several anti-reversal latches. The gearbox case is definitely SRC, I'm not sure about the rest.

The problem is that no matter which anti-reversal latch & set of gears I use, the anti-reversal latch snarls up on the teeth of the Spur Gear and totally jams the gears up.

Does anyone have any experience with SRC MP5 gearboxes? Does it have some kind of unique anti-reversal latch that I'm missing? I thought anti-reversal latches for V2/V3 gearboxes were universal?