After wrongly starting to fit a representation of single slide bar inside motion to the N10 I, resorted to drawing it up in Fusion.

Courtesy of a friend I received the prints today and they look superb.

I couldn’t resist priming a set

Then I tried test fitting it in the chassis as I expected there was a bit of rubbing down to do to ease it in but it fits perfectly.

It’s not fully authentic, but it fills a gap between the frames.