Making screw free joints for Blind Controller

To allow for quicker installation as well as improved asthetics of my automated blind controller I am redesigning the gear surround and cover to enable them to be joined to one another without screws.

Attempt 1.

For my first attempt I tried a push pin type connector, the resulting design snapped together but broke when I then tried to separate the two parts.

Attempt 2.

For my second attempt I am trying a dovetail join and have cropped the print such that I can test the joint before printing the piece entirely (should have thought of this the first time round!).

Success!