Interesting - as bad as I am at doing things opposite handed, I did teach myself to shoot pool opposite handed, at least somewhat. I guess my contempt for the bridge won out...
Never thought of using a modified bridge - I just worked on mirroring my setup and trained my right hand to form a decent closed bridge or even just a solid open bridge which I use most of the time. Can't be any more difficult than what's pictured. Can shoot well enough opposite handed to just about run out, can draw the length of the table, etc. Don't practice it enough to where it feels comfortable, but it is workable.
Actually, biggest problem I've found is not with mechanics but with eye dominance and visualization. Same issue putting left handed in golf - feels okay, but since I'm strongly left eye dominant, putting my eye in a different position really messes with me. The only time I really ever even think about that type of thing...
Thanks for the pic, love watching the old matches...
Scott