Do you still have RM PC4100 PCI Accelerator? Is it possible to send some pics, I'm very interested to see them. So far, I've got RM Nimbus X10, 186 PC2 (1985 design), 186 PC2 (1987 re-design), Slimline PC-186 and now I'm getting RM Nimbus PC-386/20 - on it's way to me by post.
Unfortunately, I don't have RM Window Box software for 3.11, only other software supplied with PC-186's, I'm afraid. I love these RM Nimbus PCs so much, but I wish I've got some RM Nimbus 486's added to my collection.