Think I'm getting close to the best fit, but my elbow is hurting

[BleeckerSt_Girl]

By moving your seat forward, you nudged your center of gravity more forward, which puts more weight on your hands to 'hold you up'.
I get that same elbow pain on my one bike- the bike where I feel my weight is centered too far forward. I'm always struggling to keep my weight off my hands on that bike. I always keep my shoulders relaxed and my arms slightly bent to try to help that situation.
When I got my custom bike (a Luna) it was pretty much the same size bike but my weight was balanced and centered better, and no more elbow pain.
If you adjust your saddle back again a little it will center your weight further back again and less onto your hands.
Try riding normally and just slightly remove your hands off the bars by an inch or so- if you start falling forward, it shows you are holding yourself up by having your weight on your hands. See if it gets helped by skootching your butt back an inch or two, as an experiment.
For me at least, weight on my hands equaled pretty bad elbow pain, even with my arms relaxed and bent slightly.

[jenniferh]

That makes sense. I had no elbow pain until the 2nd fitting. She moved my seat forward some, but the very next ride was the longest one I'd done. I moved it back about 1/2 the distance, but I'll move it back to it's original place where I had no elbow pain.

It's amazing how the smallest tweaks can cause everything to go from good to so bad. And I'm guessing as my strength improves I will have to continue to tweak things.