Larry, yeah...this Frankenstein stuff is fun. I can see why the guys using the Nikon 1 format enjoy it so much. Yesterday I took out my old Sigma 170-500 that i had not used in years, to a Tamron 2x multiplier to a F mount adapter to my E-P3. Put it on a monopod (next time have to get the tripod out) and had some fun. So, I think I ended up with like a 680-2000, or whatever crazy number it was. It worked...great time.
Today i have been using an OLD 35-135 (the big one, not the plastic smaller one)that had a "macro" feature and shooting away. Macro feature gets me to around four inches from subject, but I can focus out further.