First and foremost, be creative!! Below are just a few inspirational ideas.
Option #1 -
I cut-down (miter saw) a 4-position TWR-ELEVATOR to make this 2-position design. With the intent of having two boards mounted 1) TWR-PROTO and 2) MCU of choice (K40). If cutting PCB's with power tools is not your thing, you can buy a 2-position Tower Elevator here: http://wavenumber.net/twr-elev-2/
I just marked the holes on the back supportand drilled holes into the TWR-PROTO, a few stand-offs and viola!
Option #2 -
This option requires the removal of the rear spring. I am not sure how much value that spring honestly provides since most of the track is nice and flat.
If you have a newer TWR-ELEVATOR you usually find some way to mount it to the screw holes with some form of L-Bracket.
If you have an older TWR-ELEVATOR you can drill a hole in the Secondary Elevator (less PCB traces to worry about) and then mount it to the chassis with a L-Bracket.
Option #3 -
Check out this gallery of images: