I bought a DMT DIA-Flat lapping plate a while back (it's a fairly new product--4 x 10 inches with 120 micron diamonds bonded to a 3/8" thick surface) and it does a great job on the norton stones I've had for a while--way better than the norton "flattening" stone. A couple of the ones I have are starting to wear and I'm thinking about moving to something that is less mess--perhaps some of the ceramic stones.
Anybody had any experience using that plate with something like glass stones? Chris Shwartz mentioned he'd sharpened his shaptons about 200 times on one, but doesn't say what kind of stones exactly they are.
I'd hate to bugger up a really nice sharpening stone using something to flatten it I shouldn't. This one isn't cheap, but a lot less than some other lapping plates that have breath-taking prices. Any experience/direction out there?