The first ones I ever saw were put on an old PSE (Firestorm -I think) and they made an incredible difference !! I had a Jennings Buckmaster(original) and tried a set of split limbs ......and they made a incredible difference. I bought a Mathews MQ-1 and put them on and they made a very minor (almost non existant) difference. I then had a Mathews Ultra 2 that just had a slight amount of vibration that I didn' t like........Limbsavers took it out. Now I have a Mathews LX and it doesn' t need them.........

long story longer........bow design will dictate their effectiveness !!