In this case you could not use a reducing bush. I mean, to make the current flange set work, I'd have to reduce that raised part you see on the right hand part in the picture, from 30mm to 25.4mm And put a suitable washer into the other part with the recess.
I may be able to find a flange set for a chop saw.. Not sure.
EDIT: Actually, if that raised part were taken down to a diameter of 25.4mm, then, to put things back as they were, then I could use a washer to bring the diameter back up to 30mm. Maybe that's the best solution. Except I don't have a lathe (that can take 41mm diameter).
Edited By Richard Rogalewski on 13/01/2020 17:40:00
Edited By Richard Rogalewski on 13/01/2020 17:45:44