I have had my m-brace for two weeks now. 1.5(38mm) height and 34mm tube, 10moa. Absolutely awesome mount, and I have spuhr's, mpa, and eratac multi-cant. The level is my favorite I've seen. The no twist of scope mounting and the single bolt clamps really make setup a breeze. I've got it on a 338lm with a Kahles k25 and it so far seems perfect. I love the ability to see the level so easily. The only thing I'd like to see in the future would be a 34mm height and a version with a little wider spread of the rings for scopes with longer main tubes. Other than that, great job on this mount. I recommend this to anyone.