I am a DIY, but when I have a stuck rotor, I put a 2x4 across the face of the hub, and with two c-clamps I apply pressure evenly across the "puller" as iItighten the clamps. I apply a couple of whacks of the hammer and tighten the clamps alternately until it falls off.

Be careful, it will jump off the car when it finally cuts loose! Sometimes I put 3 lug bolts back in and place the 2x4 against the bolts instead of the hub. This way, when it pops loose, the rotor will stay on the hub.

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