I have a Hoyt Magnatech, 60# DW, 27.5" DL that I have about 350-400 shots on a new vapor trail string and cables.
Up until this past Sunday, I had my BH's hitting the same as my FP, with seeingly very strainght and consistent flight. I am shooting easton axis ST 400's with 100grn crossfire BH, shaft length of 27.75". According to the Easton guide 27" DL at 60# should use the 500's and 28" DL @ 60# should use the 400's, so after some feedback went with the 400's.
First time shooting the st 400's with crossfires I was about 6" higher than with BH's, so raised my noc and was right on the same spot as the fp's.

All of a sudden, with know known reason to me (such as damaging something or actually changing my set-up), as of Sunday my BH's started hitting 5-6" to the left of FP's. I shot more than one from stand and ground to see if it was form, but the same consistent spot. I looked for clearance issues and did not detect any, even after putting some baby powder on 5 arrows and shooting.
When I loosened my rest, NAP 1000 dropawayto adjust a little toward the riser, I noticed that the small mounting screw was broken, but the main larger mounting screw was intact.
I went ahead and moved the rest a little right, but in process moved the launcher higher and ended up setting it back down to where it appeared before fiddling with i, but still had it moved a little right as intended.
Next time shooting my FP's are now about 6" low and 6" to the right. BH's hitting where I aim, but I can see almost a curve to the shot, as like a curveball more than a fishtail. FP's appear to shoot straight but not impacting where I aim.
Any ideas that a novice such as myself could check prior to bringing into the shop that may correct this unexpected issue?
Any help would be greatly appreciated.