Major progress on finger 4.0

Coding away on version 4.0, with many enhancements coming!

• New continuous elastic design, for easier build, simpler design, more reliability, and easier adjustment
• Seamless socket, more comfortable and elegant
• New plug and bumper detent system, easier to print and build
• Cleaning up the hundreds of parameters, making many more settings automatic, for much simpler configuration

I can’t say yet when I’ll have enough time to finish a release, but making lots of progress over the holidays so far. If anyone wants the source code in the meantime I can add a branch in github.