Wow... I’m still going to try it... but I’m not getting rid of my superclamps. I manage to make a bigger adjustable knob ( sled locxx) and made it so I can lock it.. you won’t be able to unscrew the adjustment.
I just picked up the Sled Locxx today, will be testing it this coming season... I currently have 2 superclamp II and notice that they would move a bit... not sure if it’s the ski design that make the sled move or not... had the rear clamps as well, only use them twice... they don’t work well on...
I build this using the same shelving that they have at Costco, it all come apart so in the winter time it's not in the way also I got caster wheels so I can move it where ever I want. I use my sled deck ramp to put the top one.... never got a chance to rig up the winch yet... Also a lot cheeper...
I have a Nypex as well and it did the same thing for me, even when I had my Apex it did the same thing (apex had a MCX turbo). The problem with mine was that it was running rich on idle, got the problem fix by setting the fuel at idle... never had issue since then.
Did you ever think about sealing it yourself? I use to have a STF that I sealed my self with some 2x4 and some truck cab seal. It work very well, by the looks of it you would have the cross trax deck as more room under the deck got storage.