mine was converted by ken ruth. he installed a mechanism to press the button and release the lens, works fine. i had to send my M4 along so it could be properly adjusted to the lens and vice-versa. the 0.95 has a special look not only wide open, it's a lens i will never sell, even though it's not that good for quick focusing situations.
i would recommend dag's conversion with the viso mount, it seems to be the best conversion option.
initially i thought of buying one mounted on a canon 7, but tried the camera and its rangefinder was not near as good as my M6's, so I decided to convert. I actually got 2 lenses, an RF and a TV one, the RF was converted to M by the late steve serotta and i ended up selling it as it was quite soft (had many cleaning marks, flared considerably). the TV glass is in amazing condition, except for a cement separation spot in the middle of the front element. it'd cost about $500 to fix it and the element could break, so I decided it was not worth the risk. converted it with ken ruth and it's the one I have now. no regrets. i love this lens.