stuart, DA is not rotary, there is a huge different.
no way to make any damage or get any heat, more safe then rotary,
rpm given to them is not rpm of rotary, it is oscilation of the pad.
thats why (for example) amatour detailers are going first for DA machine then rotary
and thats why I prefer rotary then any DA machine for upholstery, rotary agitate better.
the white rota brush is very fine, you would need to agitate paper to make any damage, the yellow one is for more stuborn dirt and fabrics that can take it and most will do.