I'm after the ST Format issue 21 coverdisk, but a working copy. I've download various versions from the web, but they all seem to be corrupt in some way. For example the PI1s in the SIDE_2 folder are corrupted when viewed, and the Animation Master program on side 1 just dies with 4 bombs, and again none of the PI1s in the same folder will view properly (despite being the right file size). I believe the images out there are corrupted.
Do you have a version of the disk where Anim Master actually runs without throwing 4 bombs? Maybe a real physical one, or a PasTI image or something.