Hi Currently we have a working backend for either gl646 or gl841. The code in experimental cvs only allows scans on gl646 at low resolutions, but apart from that is ready for the rest of gl841 support, without breaking gl646 support even more. But we certainly don't want to include code which breaks a currently working backend, so the problem needs to be solved.
To my knowledge there are no new gl646 based scanners supported. Regards, Pierre