I also found the idea striking to utilize C-pad adapters and the comfortable Beyer pads, got that borrowed last year. Too bad NoXter and me didn't manage to find a combination that we liked.
Our probands were MS1, MS2 and SR325, and we had quite some pads to try (DT440, DT660, DT770, DT880, K270 velours, K271 pleather).