I did for a while. I am not sure I am knowledgeable enough to do a good job anymore, however.

If you are ever in Chicago, we can have beer and I will teach you how to build an amp :)

Far north suburbs. I've been a recluse, lately, but maybe when things pick up for me, I'll see you at one of the HN meetings. (Didn't realize until now that you're in the neighborhood.)