My semi-new langster, I have been riding all summer. (About 1.1k miles). I just went and did some track and it was awesome. Here is my bike in Track mode. Lots of fun.

Upgrades are

Specialized Pave seatpost and Toupe saddle (stolen from my tarmac)
Specialized Bars
Home made Double Straps
Dura ace 14T cog and Lockring.

Really light (17.5 pounds.)

I have a few pictures and one video thing, that doesn't really make sense (40 hands earlier that evening) but you get the jist. You might just want to mute it and look at the bike, I also took the pictures that evening so they are not very good.









And the Video.