Thanks for the info on the xp1 tailcap cajmapa. It was a good idea to try out.
I really dig these Jexree Mini's, but they keep getting pushed down on the "To Do" list. I have a dozen of them in different colors that I bought a long time ago to gift out for Christmas.
I'm thinking about doubling or tripling one of the caps to see if that helps with the mode switching issue.
I also want to design a 1 mode OSH Park driver board that the used the parts from the stock driver. It would require a different boost chip (PAM2803) that I already have. HarleyQuin has given me a copy of his Eagle files to help speed me up. He has been working on a boost driver in this thread.