Another shot up the quill would show if there's a sleeve in there surely
I said that. LolI've just had a look at my unrestored one and the chuck has a 3MT taper.
My guess is that there's an untanged reducer in there. Have you access to a bore scope, even a cheap one for a phone?
Certainly seems to back up the theory that photo......Looks like a sleeve, you might be able to get a ball bearing thought the tang slot, that sits on top of the sleeve, you could then use a taper to drive it out
Are you sure that Dark inner ring is not a cut down 3 Morse sleeve.This is the best photo i can get i'm afraid, i'm going to get a cheapo camera bore for my android to see if i can get a better pic.
There doesn't seem to be any sleeve in there but there's definatly some sort of burring near the top (you can see the circular line in the pics).
I ran thin bit of plastic up the inside of the quill and couldn't feel any abrupt stop from any sleeve......
Have you rung Meddings? They may have the build sheet if you have the serial no.
https://www.meddings.co.uk/
The quill, sizing, and what the cover looks like.
The quill, sizing, and what the cover looks like.
In which case they haven't been made to the correct specification.