I am new to the forum. I own a Parker Ultralite 31. The bow is very nice and I have read some good reviews on it. However i am having trouble tuning it. I am pulling aprox. 65 lbs. shooting gold tip graphite xt 5575 arrows with 3.5" right helical vanes & 100 grain tips. Last fall i wanted to switch to fixed blades, but I couldn't tune it to fly straight. The shop where i bought it was no help. He gave me several different weights to try but no luck. I have killed a couple deer with it but still think it should shoot more accurately. When i shoot field tips the arrow nock seems to tail to the left before straightening out. Any suggestions