[TowerTalk] Mast Collars

[k1uo@prexar.com (Larry Emery)]

Somewhere...recently...I read about using a 'Split Collar' to help hold a mast
above the thrust bearing while extending the mast above the tower before
installing the rotor.   Hope this makes sense?
Question here is where can one get those split collars?

Thanks, Larry K1UO