I *really* like M105, only switched to M101 as it works better for me on the clears I normally correct.
But yeah, unless you`re wired like Yours Truly the M105 can take some getting used to, from priming the pad (as per the Kevin Brown Method) to the quick work-time, to the need for a *LOT* of pads (no matter how often/thoroughly you clean them).
One *FOAM* pad?!? Sorry, felt shocked for a moment there....I can`t remember the last time I corrected even a full panel with one foam pad, no matter what product I was using. MF is different, at least if you have compressed air, but I still use a lot of them. Other than the expense (and, OK..the lost time swapping/priming them) I can`t see any downside to frequently switching to a new/uncontaminated pad. Especially when doing significant correction with aggressive products (think "cut-off clear", not just dried product). Only takes a short time for the cut-off clear to build up, and with M105`s fast work time the pad is gonna get (over)loaded with dried product *fast* even if you blow it clean with compressed air (which works a lot better with MF than it does with foam). Once it gets loaded up I`ve never been able to thoroughly clean it with a towel/etc. in a remotely timely manner, better to just grab a fresh one.