[Dafni]

Very nice, Artur, very nice indeed!
I have never had a Novak, but would it be possible to open it up and isolate the sensor part? Or maybe at least get rid of the heavy magnet? Reducing rotating mass is always good.

As for your broken tranny gears, I assume you keep shredding idlers, right? If yes, just replace it with mikes steel idlers and you will not have to worry about your tranny anymore. And a strobe slipper says goodbye to molten spurs, too.
You definitely can get the driveline up to the job with some minor investments.

On a 7XL you can also try 18/66 gearing. On my revo (and 14 cells) 18/66 gave me lower temps than the 16/66. Just a heads up.

Just for the record, even on "just" a Warrior the low speed characteristics are very good. Especially on the high-end Lehners, for which the BK controllers were designed, you get a very smooth low speed. I use to crawl over rock piles with my LT revo and a 1950, with adequate gearing.
But your idea is nice, nevertheless. Keep us updated.

Cheers
DAF