Well, I'm pretty proud to present my new self-made E-P2 thumbie. I always need my left hand free to focus quickly (e.g. most of my C-mount lenses are rather fast), and my right hand "remembers" very well to the lever of my Leica M3 (even if this lovely camera was lost in the flood of the Rhône in 2003). IMO it's the perfect ergonomic position, with the thumb well hooked under the lever, so the first finger is really dexterous and quickly in action. First, I took a 1mm thick piece of aluminium, then I cut it in order to respect the forms of the camera and the place of the "AEL AFL" button (even if I don't know exactly what that button is for). In order to make the thumbie grippy, I used a piece of my R-D1 grip - I just changed it for the famous CameraLeather black Griptac - but you can use a piece of Griptac or leatherette or rubber or tennis tape or whatever… You may notice that I protected the ridiculous and useless speaker with a little piece of classic tape : If someday I want to sell the camera to a nerd on the bay, all the functions must be OK… Then, I used a piece of top quality double-sided tape (0,8mm thick) to stick the thumbie on the camera. You can notice that the rolling stick isn't in direct acces, but it is not unattainable; however, I never use it… Actually I use always the same settings on my E-P2, in all situations : RAW files, 200 ISO (rarely 400 or 800 ISO in very low light situations), 3:2 crop factor - so I never need the buttons during the shooting! It's no really beautiful (I admit I'm not really a careful handyman), but it's really usefull! It took me two hours long, but outside the weather is in Katrina mode, and I couldn't find an equivalent accessory in a shop! (from now; I hope after reading my review, a clever chinese seller will release some on the web).