i just saw the hm4 and had a chance to speak to max busser... can i just say... wow.
the design is like nothing else you've ever seen in a mechanical watch, and the movement in action is so incredibly beautiful. i probably should keep the superlatives to a minimum, but it was pretty amazing. too bad it's too big for my puny wrists (and that i don't really have a spare 245 grand floating around).