Un-related but I don't want to make a thread for this and you guys have been so helpful. For my 66 key build is it worth it to spend the few extra bucks for teensy 3.1 over the teensy 2.0?
No I don't think so. I think people prefer the Teensy2 whenever possible. I am not sure of all the details, but I think there is something to do with flashing and such. The Teensy2 is tried and true in this community. It is by far the most recommended controller, so I would probably stick with it.
Firmware. With Teensy 2.0, you can use Soarer's, TMK, Easy AVR, etc... With Teensy 3.1, you can only use Kiibohd, AFAIK.
I find it much easier to open when the switches are inside a plate
??
I find it easiest to open the switches when loose. You just pop the 4 little tabs to open them.
Most switch lubing stations have oversized holes, so that the switches don't clip in at all. They just sit loosely in the hole.