Thanks for all the input...I am already sure my bow is tuned.....blow nocks/vanes off arrows at 40yrds and under groupings...never have had a tune problem with my current bow......like I said in initial post...haven’t tried a fixed blade since 1993...and YES Vortec was making the 2 blade version I was using in same year...one HELL of a cutting path...but furrel was weak and set screw for blade would actually drive right out other side....anyway---looks like I got some good options to experiment with...thanks all again.