I have been using my 7424 for about 6 months now. Some cars still have defects(no scratches you can feel by finger nail)buy can see if you look hard,on dark cars. I have tryed FP & IP STILL not satified with the results. I could try SSR2 before I buy a rotory. I have been around cleaning cars for 40 years, so not afraid to buy a high speed buffer. I plan on foam pads at 1000 rpm if I go there. I do have daily drivers to practice on before I go after my wife's new maxima.Will I ever by happy with the PC alone? I know it is very useful. I have seen some ausome defects that guys get out with the PC on this web site. I am not afraid to buy different products if need be. Have most of the stuff guys are using on this site. Not afraid to buy a rotory just need a little nudge. Thanks:xyxthumbs