I have just completed building a CW Touch Paddle, Model P3K, that I obtained from http://www.cwtouchkeyer.com. The kit took an impressive 6 days to arrive Down Under and was excellently packaged. The instructions were also first class.
The PCB took about half an hour to assemble and test. Worked first time. What did take a little longer was construction of a suitable enclosure.
I chose to mount my kit in a plastic jiffy box, to which I cut a few slots in the front panel for the keys to protrude through. I chose real keys as I thought that would be a rather neat thing to do.
All I had to do next was to insert the completed PCB, and begin operating.
Even though this little assembly is very small and light, because there is absolutely no movement in the paddles, the assembly doesn’t move about on the bench when sending code. It’s amazing, even though it isn’t weighted down. And it performs fantastically, too. Perfect code every time.