Gibblet,I do the same.I make strings also,and change before every season.I agree too that the poundage of bow has something to do with the frequency of my change,as well as the draw length.Before I started making strings I had a factory string on my older hoyt havoc break at full draw,it was one of the scarriest things I ever remeber.When I make my strings now,I use 452 and make sure before I do my end servings, I use square knots to cinch down my two color strings.Ever try to untie a square knot that has been sinched down?