So I have a leftover Handibot prototype from the Kickstarter campaign. This particular one didn't have proximity switches. I got a set of switches and easily wired them in. Now I have a machine that I can index back to 0 really easily.
All of you have modern Handibots with the switches already so you wouldn't need to do this, but I just thought it was so cool that I was able to easily upgrade my machine.