Is this felt from HA This Site Not Allowed Here.com? If so then it's the felt's fault, it's too mushy. If it's really true "rock hard" felt then it might be you but I hesitate to blame the user if the felt is truly rock hard because this stuff os so forgiving to improper technique. Plus, you're using leather without edge rounding so my guess is that you know what your doing here. So I'm back to guessing that the felt you have as being too soft.