... the legendary and completely fictional racer who won the also totally made-up 192-hour Tokyo Enduro of 1964 as captain of the ridiculously fake Team Mabuchi, I did an old-school FT16D. I was going to use all Mabuchi parts (even though it only makes things more difficult). The shaft on this motor was splined, so I cut it off at the end, and pressed the stack onto a new shaft... a fiddly PITA. Having done that, I was able to use the stock lams (which work well BTW) and installed a Tradeship comm.
The magnets were shimmed way-the-heck in and, after tossing the fiber stack-end insulators, the arm got powder coated. Of course, it had to be Yamaguchi-san's favorite 50t/29 wind. To top off the set-up, the hoods got drilled and soldered to the brush tubes, and backed-up under the hood screws with a phenolic washer. A set of NOS brushes, 15 gauge stainless steel springs, and post sleeves made it all vintagey-goodie.
Result is a vintage motor (with some of my last clean Mabuchi FT16D parts) that sings a lovely song. Good for 192 hour enduro?... Certainly not!, but pretty danged good N-E-Waze.