I just got my Splitgrade Controller through the post today and have manged to get it all set up. I've been having a play about with it and have set it for my paper. Bear in mind I haven't had a proper read of the instructions yet before aking this. Don't shout! So yeah, I've waved the wand about a bit underneath the projected image at f/5.6. The Controller keeps suggesting different combinations of exposure time and grade though, even though I've scanned the image in much the same way each time. Shouldn't it be consistant? Has anyone got any hands on advice which could help me. What's the best way of probing your negs?