Hello colleagues, I am proposing the following contest: write a two part invention, any instrumentation, time limit 3 minutes. As I have done for contests in the past, I would ask the contestant to submit the entries to me and I will post them anonymously for the members of this site to vote on. I will host this contest if if 5 members commit to participate by Dec 31st. That is not the date I need a submission, only the date by which I need 5 of you to say you will participate. If I get 5 commitments, the contest is a go.