Time Trial / Time Trialling / TT

What I need is quite strange. I have a set of 28h Mack hubs on order and am using a Cervélo P2C frame with a broken hanger. The Mack hubs are coming with 120mm and 130mm end caps so they're usable on the frame.

I think we agreed on that spoke count is a bigger factor than rim depth, what is your situation in that manner?
I'm not 100% locked in to 28h front and rear but as I'm wanting the front and rear to match with 3 cross lacing, I don't really think there's much give here.

Are you budgeting more than the cost of Shimano RS30?

Edit: came to my senses, you definitely want a fixed wheel, right?
http://www.planet-x-bikes.co.uk/i/q/WPPXPCT5050/planet_x_pro_carbon_50_50_track_wheelset

A set of Planet X track wheels will definitely be a feature at some point. Just not right now. What I'm trying to do is build a street wheelset with a bit of an allowance for TTs.

Guessing from his rim choices he doesn't want tubular either!

As above, A 50mm carbon tubular wheelset will be something for another time. One problem about this is that I'd have to choose a tubular that works well on tarmac but can be cleaned up and be sticky on a wooden track (Glasgow velodrome). This is a problem for another time.

Higher rotating mass is better for a TT unless it has a lot of bends you have to slow down for.

I'll have to have a look at the local courses. I've only done the one course multiple times but this season will branch out.