Relay based switcher; idea?????

[Bernardduur]

Hey all!

I am searching for an idea for a switcher box; I am building this switcher for a bass player in a known metal band that wants to switch in and out his effects. I had some ideas but he wanted something I was not able to add it to an idea
- One small box that switches the effects in and out
- 2 remote boxes that switch the main switch box.

The 2 remote boxes should work individually but have to do exactly the same. He should be able to turn it on with the one and turn it off with the other if you get my point.

I found this little thing; is the "one footswitch channel" box one of the remotes or am I on the wrong track here?