I’m finally getting a new tt bike yay me!

I already have a road bike so am planning to get a race ready tt bike with disc and 80mm front. I’m assuming I will need valve extender for the front and different tube stem sizes to accommodate both the front and disc as the disc likely needs a super short stem tube.

Any problems or things to worry about this sort of setup for training? Other than having to carry 2 different types of tubes?