Happy to say my F7 made it 120 miles in Ironwood area with no major problems. Sled rocks! No coolant needed at all, only problem is minor, leaking brake fluid, thinking it's a bad line. Sled has awesome low and mid range. For those of you who have posted turning radius seeming bad, I put some 8" carbides on it and it has a tighter turn radius than my 01' Sno Pro. My F7 is the Sno Pro with 102 picks, staggered side to side.
Did several drags with both my 01' SnoPro (this sled is one of Black Magic's test sleds with a carbed 711 Invader engine) and F7. The run was, I would guess, about 300 yards on a lake norhteast of Ironwood, not Gogebic. There were sleds from all makes and cc's, it was dark. I know there were several Revs and Polaris, but no Yamahas at all. 1st run with 01' Sno Pro beat every thing, not even close ,only sled with me was an F7 Sno Pro picked.(This guy pulled next to me and asked me what the hell I had in there) As the races continued I got on my wife's F7 and once again smoked everything. She said there must have been about 15-20 sleds in each race. The only sled that was right there with me and the other F7 was a 2002 ZR800, actually he was pulling us at the end of the run. He claimed it was all stock, except for studs.