I use the Eleven Rack live and I switch between two guitars. I only have a single wireless unit and so I leave the receiver on a strap which has Schaller strap locks on it. When changing guitars I simply remove the jack plug and unclip the strap. Simple!!!

I now have a Martin electro-acoustic which uses the strap pin on the bottom as the jack output. This doesn't fit the Schallers, meaning I have to run it to the PA direct via lead, or get another radio unit - just for two numbers.

Is there a locking strap mechanism that will fit both electro acoustics and electrics that are quick release, apart from the Planet Waves locking straps which aren't very quick to use?.

I use Grolsh "strap lock" on my Les Paul, not very quick to use but very quick to drink