Unlike its less robust cousin, the newer Master M175s don't fall as readily to the same simple, YouTube-famous bypass as the 175.
Decoding with a feeler gauge is not impossible, but harder than your average wheel combo padlock.
Considering the above, I started looking for an additional method of nondestructively opening these locks. With many simple wheel combination padlock and cable locks, shackle or cable tension while manipulating the binding wheels in turn will cause the correct gate to 'bite', eventually allowing the lock to be opened once the correct 3- or 4-number combination is devised.
No bites. This wasn't going to be quite that easy. Tensioned the shackle, and kept going.
After a lot of spinning and combo resets, I noticed a pattern. With shackle tension applied, each number on a lightly binding wheel could be moved through a certain range. With non-combo numbers, moving the wheel upward causes it to stop right about here (keep your eyes on the third wheel):
Once you land on the combo number (8, in this case), however, the upward movement can go a little higher, like so (again looking at the third wheel):
Basically, you're looking for additional few millimeters of play in the wheel once you've hit the true gate. After hitting the first number, move on to the next wheel (in this case, the second).
Nine it is. Keep going until you reach the last wheel, and…
On one lock I tried, the far right wheel bound so hard it could barely be moved under tension. With that being the case, I simply set the other three wheels, then cycled through the ten possibilities on the wheel until it opened. It's not foolproof method, and does require a fair bit of finesse. Some locks are touchier than others, I've found.
Should anyone need to recover a combination to one of these, hope this helps. Haven't seen this specific method demonstrated before, but I'd be extremely surprised if I'm the first to come up with it. Doesn't appear to have been described on the Forum before, at any rate.