My tt-023 is built and road ready. If anyone would like close-ups of any bits let me know.
The brake lines feed through the bars straight into the headset and through the frame to come out near where the calliper are mounted.
The cables for the gears if not using remote shifters are a little tricky but run down the bars through the arm pads, come out the back under where the elbows would sit then route into the headset through the 2 eye holes. I have electronic remote shifters so didn't run these.
I had my LBS ran the lines as it is a very tight fit (brake lines only, I didn't have the tools). From what they said you need to tighten the levers in first then pull the cables through to the callipers, mounting the front end as you go. The reverse of how it would normally be done. Also the headset top tightens front to back. Otherwise the bull horns don't sit tight enough to hold riders weight.
I have only done 40km on the bike, before having to take time off due to an unrelated injury. Compared to my other TT bike it feels similar maybe a bit more twitchy, but I had high cross winds and the 80 front wheel was just a big sail pushing me all over the place. About to fit a 50 front, hopefully solves some of the twitchy riding.