Press/release button with solenoid

In my Chess Clock project I wanted to create a switch that is hold down by a magnet (part of the micro solenoid), and released electronically.
For this I have design this set of parts around a cheep micro-solenoid.
- The first piece will sit on the top of the solenoid. [Should be split before print, and glued together afterwards!] This piece will keep the lower end of the spring.
- The second piece holds the T-bar, and the other end of the spring.
- The third piece connects the second