Bottle cage / bidon mounts on a track bike

looking at getting a dolan track champ/ pre cursa/ or tk2...for london roads for the meantime as an upgrade from my langster.
i kno theyre all track frames and dont have bottle cage bolts..anyone actually drill holes for a bottle cage on theirs or is it a better option to get the bottle holder to attach to the saddle??

The felt and track champ have shaped tubes which would make fitting these adapters impossible, but that's because they are track frames, duh.
The Precursa would take it, but then Dolan make the FXE which is essentially the same thing with bottle cage mounts