100% of my riding is done in the U.P. and no off trail riding at all. On the first day of our trip is was bitterly cold and some of the trails we rode on were groomed and set up so hard as result of cold it was like riding on paved roads, trail riding perfection, our F8 is lightly studded, 2/per bar, center of track only, 2017 ElTigre just standard track which I believe is a rip-saw, both are 129's When I had stopped, other than the line from my runners the only penetration I was getting into the trail on my ElTigre was light marks from the tops of my track lugs which were even that hard to make out. My question is... for better lubrication of slides and snow for heat exchangers what would be better, lightly studded like our f8 or are scratchers more beneficial and do they still work well on shorter tracks (129). My other question is I have always been a fan of using only OEM hfyax, is there a better than OEM out there? and what do you recommend if there are.