J&L have chucks and part-finished backplates for sale, including in the
latter category L-zero which fit the colchie student.
The backplates are by toolmex, and from the picture it has the L-zero
fitting, 6 counterbored holes and 3 threaded holes. I imagine the 6 holes
correspond to the mounting holes for the toolmex chucks of the corresponding
Are the toolmex chucks any good? Is it worth the extra hundred or so quid
for the high-precsion model?
They don't quote typical precision values for either of 'em. mind, the
comment about backplates may be a red herring, as it says "other mounts
available", so it might be that they make a specific L-0 one, it's quite a
common fitting, although I suspect a bit out of date.
15 years ago