OK - I'm back from a very exhilarating ride.

Thank you very, very much for all of this awesome information. Honestly - you people are the greatest. I didn't move the shifters yet, but when I do I'm going to have this thread right in front of me.

I took out two of the spacers from below the bars and put them above, rotated the bars, and then fixed the aerobar. I took it for a nice ride and stopped about 3 times to make adjustments along the way. I'm thinking I still want to raise the seat a little and maybe drop the bars more. It's feeling so much better than before - much more enjoyable to ride. Thrilling, actually. I think it can still get a little better, though.

My knees just touch my elbows when they come up. It feels comfortable to me but I'm wondering if it means I need to move my seat back a little. When my legs are extended, there's still a bit of a bend to them.

I'm much more comfortable in the saddle now - like I'm not sitting in it so heavily. Part of it is that my legs are getting stronger and I'm riding in slightly higher gears, and part of it is that I'm leaning forward more and putting more weight on my hands.

Here's a picture after the adjustments.