So after running the TP spring with the stock and 35/39 helixes and blowing 3 belts on my trip North I figured I'd give ulmers stage 2 a try. I've had this for a while but didn't have the time to dial it in.
His helix is quite aggressive and is progressive (not a reverse). His secondary spring has slightly more side pressure than the stocker. The STM helix is machined for use with the stock spring which was a bonus.
So I'm still running a 1.25 ripsaw 2 with 192 1.575 Megabites and am geared up with a 22t upper.
I ran 5 or 6 back to back runs on shitty ice all mid 120s GPS. Stopped once slowed down to check clutches every pass. I'm able to put my bare hands on the clutches, they are warm but not crazy hot and my sheaves have never been so clean. No snow left here but I tried running around the lake jumping from snow patch to snow patch to try and emulate trail riding speeds to check my clutches. They were Luke warm I'll call it.
STM weights were loaded with heel empty, mid empty, 1 tungsten and 4 washers in the tip. Ulmers pink primary spring. Rpms come out at 88-89 and climb to 9000-9050.
I'm running TD powertrail CAI tune.
For a quick test I'm more than happy with the results so far.