I don't play tennis...but I know what it feels like! I have it. They are sore. Chatted with my LBS today. We talked "fit" for almost an hour. I know that this seat is NOT what I should be riding on. It ididn't bother me for the first part of the spring, but now...bottom line, my Mongoose needs to be limited to the grocery store. It is not enough and way too heavy for the riding I am enjoying now.

So...I drop the credit card sooner than later?? LBS is going to take a Ruby they have from last year and build it for Saturday. I will test for a long ride. He will do a basic fit and then I'll give it a try. It felt great on my short 20 min test but I wanted to spend more time on it to be sure.
It is a lot of $$ and I hope I am moving in the right direction with this. It is exciting and scarey! I'll keep working those extra shifts!

Thanks for explaining the wheels.