Anyone have a recommendation on a high quality M-mount to X-mount adapter that includes close-focusing ability, a.k.a. adapter with a focusing helicoid? I bought a Fotodiox brand one but it's quite cheap (in both senses of the word) and I really dislike the tiny button for disconnecting the lens. I was extremely impressed with the Voigtlander VM-E adapter for Sony and that's what I'd really like... but unfortunately they don't make a version for X-mount. I was looking at the Hawk's adapter but I thought I'd ask here for personal experience and feedback before I purchase anything. Any suggestions? Note: Price isn't my main concern. I'd love to save money, but having seen the difference between a $40 adapter and a $300 one, I'm ok with spending more if it means quality of design, build, and features.