Apart from their lower profile they appear to have the same speed/performance as the 3-1 HL gearboxes. They are slightly more expensive though. Rob might have more info.
Cheers
Chris

Bugger, I thought you had made the turret schurzen, didn't realise they came with the kit.Mackem wrote: That's one hell of a job on the turret schurzen Chris, the hull schurzen will be a doddle for you after that.
Great work
John