KM is especially weak at repair, if you wish to reach the repair cap at 120 with 4 base 12 repairers, you will most likely need around 200 vets per repairer, plus contributions from other sailors (since all sailors add repair).

Theres some discussion on the subject in this thread.

Engis can add a fair proportion of repair as well, which helps cover that final 8m. Still wont cover all of it, but even adding 1.5m each means 4 engis can also add 6m. The tricky part is topping up the final part from gunners and BO.

200 vets on 4 repairs like that will only get you 21.2 M repair - very far away from the 35 M for the cap. Even your other sailors will not get you much closer.

With 300 vets on all 4 of them, you'll get 26.7 M repair. Already much better, but getting the remaining 8.3 M is not easy.

So for KM, I'd say, forget about the rep cap.