Quick-Twist Release Greg's X Carriage

Well finally printed it and almost worked strait off the bat. The tabs are a little bit too long at the moment and have to shave about 0.5mm off of them, may be tollerance setting.

Basically bolt-on tabs on the bottom of the extruder and grooves in the x carriage that the tabs slide into and lock in place, takes about 3 second to take off an extruder, just twist and lift.

And no addition hardware

Print it just right and it will hold as good as a stock carriage.

Note: Pictured