Keep in mind that the Cimex has a very different design than either OP or standard rotary floor machines. Pads of just about every type, however, are interchangeable. I have a 24" Cimex that I use on my largest commercial jobs. I can take a FiberPlus or FiberMax pad that is used on one of the three heads of this super-size machine and use it quite nicely on my little Cleanfix Floormac (a 12" orbital machine similar to the Oreck Orbiter XXL) I also have an Orbitec CX-20 machine, and pads sized for it can be easily trimmed to be used with a smaller Challenger.
Additional comments: if you are interested in working on natural stone floors, you should look into the pads made by
EcoStone. www.ecostonesolutions.com. Eco Pads, as well as the newer Cheetah Pads. These would work well with an OP machine.