I recently bought a SW shaft from Duc and it came with his CM360 tip (25NM). Been playing with it for about a month. This tip holds chalk very well. As I am those kind of fast type of player, I can go on a few shots without chalking, and there hadn't been any miscues. Feedback on the cueball is also good (draw, follow etc). It also have no signs of mushrooming, unlike previous tips that I've used ( Kamui Black SS, Moori M). However, I find the tip (25NM) lean more towards the Medium-Hard category than Medium. But overall, I like the tip a lot and I feel that it is on par with the current Kamuis, Mooris, etc, if not better! Plus, you won't go wrong dealing with Duc. Absolute pleasure! Cheers!!
Just my 2 cents.
Brice.