I made a comment recently about compatibility with the most recent version of Survex, so that I didn't need to change between versions of the latter when viewing 3d files generated with either Survex or Therion. This was to be takien on board with the next development snapshot. I see this morning that Olly has uploaded Survex 1.1.16. Aven seems smoother in use on this. Could this be borne in mind when the next Therion snapshot is produced? Many thanks Graham