Are those the #30 tapers with the built in pull-studs?
The ones with the larger body that the collet snaps into the cap and then assembled to main body?
We have two BTC 1's just barely pluggin away with a reasonable amount of extra tooling just laying in our tooling crib!
If ya got a tech print I can take a look and spare some tool holders!
We even have some floating tap holders, end mill holders!
Let me know!
Larry