ProS, first if you are interested I have a new complete set of Dalton adjustables QAP-3 to sell (PM me if interested ) that I did not use last season and now I am buying a 850 so they are not heavy enough. If not using those weights, get a set of Polaris 10-68 weights and a black 120-310 Polaris primary spring part# 7043681. A Dalton P2 48-44FP or a 50-44FP helix these are custom cut by Dalton but they have cut them before so there should not be a setup charge. I ran the 50-44 but wanted to try the 48-44. The 48-44 might be a safer bet if you don't want to fiddle. Get 2 Polaris P2 springs. a 140-200 part# 7043495 and a 145-220 part# 7043496. If you only want one, buy the 140-200. If you buy both start with the 140-200. If you need a little more backshift and topend rpm try the 145-220. I would adjust the gearing to at least 1.68 or 1.73 You can just replace the upper 23 gear to a 22, use the stock chain and bottom 37 gear. this gives you a 1.68 ratio, which is a improvement over the stock 1.61 ratio. it does put a bigger bend in the chain. Or you can go to a 40 bottom gear and a 70 pitch chain, with the stock 23 top gear. this gives the 1.73 ratio, which is what many, (most?) trail guys change to that regear. Everything I posted above has been ran by many, with the exception of the P2, but that setup has still been used by several. I don't claim to have invented the setups, but I have ran them and was pretty happy with it. You can fiddle with all the above based on what you want, but this is a very good setup. I ride up in Vilas County every winter, so you probably know the conditions I encounter.