Is it necessary to get the 6 inch PC or would the five inch model work. I saw a PC 7335, which is the five inch model for sale but I did not want to the plunge unless I knew it would work with all the pads that you guys are using. Thanks in advance for your help.

 

actually those are both sanders...

you want the 7424, which is a body adopted for polishing:

http://www.coastaltool.com/cgi-bin/SoftCar....htm?E+coastest