M_Boats: mast rake

Montypals: Was out in the boat in the driveway yesterday making some measurements and a few adjustments on my M15 Kestrel. With mast up I raised a plumb to the top of the mast with the main halyard, Measuring from the back of the mast it looks like I have about 8-9 inches of rake aft. Is that too much? My boat has a fair amount of weather helm, but I now have new sails, and have not yet had a chance to sail with my beautiful new main. I suspect my new main will reduce weather helm. Thoughts about the mast rake? Daniel Rich M15 #208 "Kestrel" danielgrich@gmail.com