I've been having trouble figuring out this slide projector I was given, a Relfecta Diamator AF. After sorting out the two-prong plug issue I don't seem to be loading the slide tray properly. It's a straight tray labelled AGFA CS System. The few slides I already have are set in normal plastic slide mount. If I just set them in the tray they wobble out of place and jam when changing slides. There are some formations on the bottom of the tray that seem to be there to grip the slide mount, but it's a pretty tight fit and in my photographic experience forcing things is not a good idea. It's not much force, but enough to make me think I'm doing something wrong. Does this tray require special slide mounts? If so, would another "normal" straight tray fit the projector? It may not be the biggest deal since I am planning on using Gepe anti-newton glass mounts on the slides I get developed from now on, so if I can find ones that fit that'll be fine. Thanks for helping me on this little adventure everyone!