FMINUS said:
Why do u need different backing plates? Are they all the same size?
Bp that comes with it ("black") is meant for generic sanding in woodworking. It is not firm enough to be considered solid and used to bear down for heavy correction nor is it soft enough (for my taste) to be considered similar to flexible backing plate and used comfortable when going over the, say, ridges on the hood.
That is why I got supersoft one, it is much softer, it is closer to being flexible like. That one is what I planned to use majority of the time.
Polishing one is thin, solid, firm, period. Something that I would use when I need to bear down for more aggressive correction or in any other use such plate is better choice.
Also, let's not forget Festool is a sander. Having all plates allows one to use it not just for car polishing but also for number of things around household, from dealing with that garage door and deck in backyard onward. Two birds with same stone, car and house.
Yes, all bp are same size, 6". They make them in one size only because that is how you balance tool to be vibration free, you design for one size and you manufacture your own bps, that way there is no variation in weight and centrigual forces.