Thanks for all your comments I really appreciate them, to answer some of your questions: All the keys use ball race bearings, the second key is based on a Swedish key I have another one about 90% finished but I’m not going to use bearings on it I will make trunnions like the original key used. All the contacts are brass but I silver plate them. The bottom key is a dual paddle that I used magnets instead of springs, this was the first time I used magnets and they worked really well.
Pete I’m not sure what you mean by keyer generator if you mean what I use to test the keys with I plug them into my Yaesu 857.