Billy Goat
WKR
I haven't seen it. I've seen groups open and be dispersed evenly around the a point, but not a group shift.
I haven't used one, but I know my target bows will get a vertical shift when I shoot them without bars. That's not just taking off the front, but front and rear. Pretty sizeable shift, but I am usually using a 28" front with 6-8oz on the front.
Seems to me using a quivalizer and removing weight out front will change the bows reaction, changing the impact.