I've just bought a new DTI by Dasqua from Chronos in the UK which has twice the normal range of reading and is now 1.6mm
but what got my attention was the fact that the top support pivots so I realised you could tilt the body out to get
a larger radius when trying to centre a work piece.
I hope the pictures explain this.
I still haven't worked out why the scale goes to 40 and then back again, perhaps some here knows.
Geoff