I'm a little frustrated with my inability to remove swirls/scratches with my pc. I have tried many approaches but nothing. I'm going to see what SSR2.5 can do but if that doesn't work I'm going to really consider getting a rotary. I've read that there seems to be a split between the Dewalt and Mikita. What is the learning curve on the rotary? I'm afraid that I'm going to screw up the paint. Also, are the PC pads (DAP kit from CMA) interchangeable with rotary's?