Paul was visiting Proco and checking out some inventory they were trying to unload. Among the lot were a few Switchcraft silent plugs. One of the salesmen flicked the button a few times and it flew off. He said that was precisely why they were getting rid of them, and although they worked great, sooner or later either the button would fly off or dirt would get in the contact and prevent shorting. Paul asked if they were in demand and the answer was DEFINITELY. It became the topic of one of our weekly meetings back at the shop and about a month later one of our employees came up with the idea of the sliding sleeve. Fast forward a few months later and it was added to the product line; within a year it was a major contributor.