Lazer Diff in DB1

[DJ's Dad]

I'm missing something somewhere, we've just stripped a second crown gear in a Lazer diff both lasted less than 3 minutes. I've replaced the both gears and the casing. I've checked the mesh and adjusted the shims washers accordingly.

I've built 4 Lazer front/rear diffs for both ZX5's without a hitch. Is there anything special/different when it's in a DB1?

I'm puzzled and would welcome suggestions/things to check - thanks Nigel