How can I improve the feel of my original (beige-key) IIc keyboard?
You can improve the feel by removing the black rubber mat. This is a spill-guard; but, people complained it hindered their typing so it was removed in next generation IIc’s. You can safely remove yours by just lifting it up; it’s attached by a few drops of glue. Some people claim typing is even further improved if you remove the small metal clips in between each key stem (these produce a click sound when you type). You can reverse all this if you do it carefully, I did myself.