Thanks cheehtae. I'll see how it works on our track.
I use a spool (think it's a EVO IV, with TA-05 spool steel outdrives) in my current setup, but I think a diff might be better...
Our track is very bumpy though. So any pointers with that in mind is appreciated
Also, the foams you use are not available here. So we use foams for nitro touring (35-42 shore 26mm). I have no idea how grip is in them compared to e.g. Jaco...