Good to know that all's well that ends well.
Thanks for telling us the conclusion to the story!
If anyone else is concerned about Chuck Blackplate, registers, fixing hole PCDs, etc; take a look at Arc Euro Trade Catalogue No. 10. The dimensions for the chucks that they supply are on Page 9.
Probably the same data can be accessed on their website.
Howard
Edited By Howard Lewis on 05/10/2018 21:11:43 TWO fat fingers!
Edited By Howard Lewis on 05/10/2018 21:12:12