I purchased the blue box 6br reamer this morning from Pt&G, thanks to David Kiff, and had it shipped to my smith. Turns out they wanted to have one anyway so money well spent that is credited to my build.
I also learned from David that they can turn down dimensions on existing reamers for a $25.00 charge.
I also learned from David that they can turn down dimensions on existing reamers for a $25.00 charge.