Oh .....
Ken and I were referring to the Sierra twist. . I could be wrong about the Gatsby being the same.
Going to Mike Redburn's website ....
Tools Tap/Dies 8.5 x 1 mm .... this statement is made beside the 8.5mm x 1 tap listed --
"8.5x1mm for the Baron/Sedona Navigator style pens and the Sierra style transmission threads"
With regard to the Gatsby, the PSI blurb reads:
"... the Gatsby [Twist] Pen Kit exhibits
mystery, flair and elegance ..." :biggrin:
but their instruction sheet doesn't help much ... looks like the Gatsby transmission is somewhat different from the Sierra.
I see from here ...
https://www.woodnwhimsies.com/media/Instructions/Monet.pdf ...
that the Monet transmission looks similar (in size only) to the slimline transmission and is totally different from the Sierra.
Seems that I should never have joined this thread !!!! . . "I didn't know that Healthcare could be so complicated !" . :biggrin: