Run a high volume detail business for 20 years, these are ok but the elevated pad due to the adapter, especially on speed 5 and 6 on a porter cable is hard to control., most of the guys are highly experienced buffers and use it one handed without the handle. You can role your fist right off the thing and lose control. Also ruins the balance of the porter cable and all 4 screws vibrate loose on the porters head forcing the buffer to split in half. The cure is use your buffer handle, and tighten the hell out of the pad and adapter. Use locktight on the four screws that hold the head on the porter cable. The normal low profile backing plate is much more in balance and easier to control. NOW 6 PORTER CABLE XP BUFFERS FALLING APART IN TWO WEEKS DUE TO THIS ADAPTER HAS TO TELL YOU SOMETHING SO BE CAREFUL WITH THIS THING!
Merchant Response:There's no replacement for the proper backing plate on the 7424xp. The adapter is not designed for full time use.