Sorry, meant Crux, not TriCross 😳
Anyway the Crux has a 425mm chainstay, whilst the TriCross has a 440mm one. Plenty short enough.
As for repair, well both ali and carbon are tricky but can be done, but for pure racing the weight disadvantage of steel rules it out.
To be fair I can’t say I’ve ever bought a frame based on how easy it was to repair.