[Andy Capp]

Thanks Leo, I understand now. To continue my understanding I viewed Pendles Slot It spares web pages. I noted on you very helpful Slot It table that the depth of offset can vary, yet the plethora of offset gears listed, didn't specify an offset depth. So I guess the depth isn't another consideration? And the pinion can stay the same?
For now, I think we will stay with a simple in-line set-up, but in the future if we feel the need to squeeze out a little more performance, we can have a dabble. Sounds like the top of a very slippery slope.
 Regards
Ian