The actual helical is caused by the curavture of the clamp. If you' re using a dropaway, adjust the nobs to get as much of an offset as you can, while keeping good vane contact. For a TM hunter style rest (2 prongs) you' ll only be able to get away will a slight amount of offset.

As far as cleaning is concerned, use isopropyl alcohol to clean the rear portion of the shaft. If you' re using AAE vanes with Fastset gel adhesive DO NOT clean the bases of the vanes. They are treated with a type of accelerator that bonds almost instantly with the fastset gel.

I personally think that either fastset gel or goat tuff are the best adhesives for a vane to carbon bond. I prefer bond-tite for a feather to carbon bond.

Hope this helps. Good Luck!