I have and use a black Rapidwinder II as developed and manufactured by Tom Abrahamsson in Vancouver CDN. As I am left eyed, the baseplate replacement trigger film advance means I don't have to take my M4-2 away from my face when shooting multiple images. However with Tom's passing they are no longer made. For those that have one or more, did it work out well? Also is there any demand among Leica film camera users for them as replacements for M and LTM Leicavits that are now broken or considered too valuable to use. As I would like at least two for LTM cameras, I'm hoping there are still those who want one if they went back into production at the same quality level. Mine has made my M4-2 a wonderful user camera.