I have a thought (dun-dun-dun). I have seen (somewhere) a clutch bell that has interchangeable 'gears' (the toothed part I guess), which allows for gearing changes without removing the whole clutch from a nitro engine. Now, say you used the Tekno RC clutch adaptor, fitted the afforementioned clutch, but filled the clutch part with JB weld -welded it up solid basically-. My thinking is that this would allow you to use different sized clutch 'pinions' to alter gearing, the advantage being you didnt have to buy lots of expensive (but brilliant none the less) mod 1 pinions to find your perfect ratio, but instead you could use the no-doubt cheaper interchangeable clutchbell 'pinions', and still have motor braking & reverse. Just a thought anyway...

Had the same thought myself, but you can only use them in forward, cause reverse will unscrew the pinion from the clutch bell. And it will be 3-4 times the weight of a std pinion gear, and longer too. I had an adapter made up to use the nitro 4tec gears on it, so gearing choices would be possible, never used it though.

Hmm, bummer. Back to the drawing board then....

It could be used on a forward only conversion with mechanical brakes.

Aye, I had that thought too. If only there was some way to stop the 'pinion' from unscrewing..... pah, matters not.

I do not know, but I do like my custom pinions and now Mike has really nice pinions as well. So why you need for REVO clutch on pinion and clutch in tranny...sounds like waste not even considering extra rotation mass.
But, not to go to far from topic, there are some cool features of the clutch which would be nice to implement in ESC software, like slipping on start and instant torque (not delay) at some RPM (over the clutch lock point...). I discussed with Mike possibility of implementing such feature into electric drivetrain and I can see how that can be implemented via software, no hardware required for that.

Is there anything that cant be done with modern electronics?!.....

lol, generally no. Doing things electrically is usually much better than doing it mechanically because the variables can be programmed and more complex mechanical stuff wears out faster.