This would be a great little club project or kit for anyone taking the foundation/Novice course and unlike many such novice kits will be of use in the real world!
When starting to learn how to send Morse code it is always advisable to start with the straight key. The problem is that Morse keys are expensive and this can discourage people from learning the code. Many People try to make their own key and we have all seen simple designs made from hacksaw blades and drawing pins. Often these designs work but are difficult to reproduce and lack any form of adjustment. This Flat Pack Key (FPK) is designed to be low cost and ideal for anyone needing a simple key suitable for classroom or back packer use. My own straight key, a Pettersson Swedish pump key cost many times the price of the FPK and I would not be comfortable to take it out on a field day trip for fear of damage or losing it.
The FPK is easy to build but will require you to solder one PCB connector.
The MK2 version changes make the key look much better and now it even has a knob, also it allows for a wider range of gap adjustment.