This topic inspired me. But I have a i-con 1V.
Same pcb inside, just less components and also 1 port less. Electronics is part of my job, but I do not do enough of it to mandate a large lab setup. So I bought the version that I thought would just fit me.
I love that thing, and I also have the i-tool and the chip tool vario. Fast, accurate, powerful. Such an improvement over my old weller clone. I also love it when the controller starts to "sing" faintly when power needs to be dumped in the tools. Lets me know I have a good contact.
So there I was, in confinement, nowhere to go, and doing more electronics than usual. And there I got really tired of switching plugs all the time. I did not want to hack the controller too much, so I made an external switch.
A switch with 3 states: left, right and a timed inbetween "no tool". The latter is mandatory between left/right tools for about 2 secs for the controller to not freak out. The switch is fully isolated, and via monitoring of the signals, switches itself on and off automatically in sync with the controller.
I even thought about implementing communication with the tools to show "too hot to touch" temperatures of the disconnected tool, but that was characteristic overengineering, and I wanted to try out the Attiny 214. That guy would probably be too small for a full comms stack and it would require some more components and a lot more time. So I saved that for later.
I found a nice case that would fit very well under the controller, milled the font panel and the pcb (with a mill that was way too blunt as I found out after I started, but the PCB was luckily still usable after some cleaning), and was able to put it all together in rather short time. Yeah, the metal plug and the white cable are an eyesore, but hey, I took what I had lying around. Postal service was/is extremely limited. And did I need dual color leds? No, but they were all I had at hand, so made a use for them.
Does the switch work well? Yes, and it is a joy too, since the heat up time of the tools is so short. Really easy to use. One big pushbutton. I designed it so that the relay click pattern gives audible hints too, so in short time you don't even have to look anymore as for what tool is active. You just grab it.
Is it economically viable? No. For a one-off the BOM gets close to 100 EUR if you have to buy it all in small qty. Just get the i-con 2V if you really use more multiple tools regularly. But on the other hand you could use this to extend the port range of a 2V to 3 tools or more if you want (while keeping your warranty).