I made a drawing now and I see there’s one problem with that idea: the other location is “open”, so the chain is broken there…

Yes, it should be possible, I’ll have a better look when I have some time

You can do this with a DPDT AB switch (or two AB switches) and two Y-cables. How’re your soldering skills? I suppose if you’re making this yourself you can forgo the Y-cables and just add more jacks.

It’ll go as follows:
the guitar (or whatever effects you’re using before the super ego/chorus+M.Pog) should be connected to the first switchable input.

The ‘A’ channel of the first switchable input and the superego’s effects send should be summed with a Y-cable (or multiple jacks wired together) and go to the Chorus input (and the chorus out should be connected to the M.Pog input)

The ‘B’ channel of the first switchable input should go to the Superego’s input.

The M.Pog’s output should go to the second switchable input.

The ‘A’ channel of the second switchable input and the Superego’s Output should be summed with a Y-cable (or multiple jacks wired together) – these then go to the amp, or whatever effects you’re running after the superego/chorus/micropog.

The ‘B’ channel of the second switchable input should go to the Superego’s fx return.

I’ll probably be able to make up a diagram after I’m done at work if this doesn’t make sense.

you could do it without soldering too, but you’d be buying two a/b switches and a few y-cables (and presumably a few more patch cables). Just more cost effective to make the part rather than patch it together from utility equipment.

Heck, you could probably just add a switch that controls where the bypassed signal goes when the superego isn’t on if you’re handy with a soldering iron and there’s a bit of room inside the SE.

alright
so here’s a signal diagram. You could make it like this with two A/Bs, 2 Y-cables and a few patch cables. Each of the stacks of 3 boxes is one AB switch, each circled plus is a Y-cable. It’s probably a bit messy.

personally, I’d remake it in a breakout box. you’ll need 8x 1/4″ jacks, 1 enclosure, 1 DPDT stomp switch and some wire. If you want to make it powered, you’ll need an LED, a resistor for said LED, and to change out the DPDT for a 3PDT switch.

If you were going to be building it inside the superego enclosure, you’d need a fair bit of room and probably a surface mount soldering station.

edit: herp, I mixed up where the send and return jacks are on the S.E. for those pictures – in the diagrams above, consider the jack above the output the ‘send’ and the jack above the input the ‘return’. Apparently I also mixed up the direction signals go into the chorus/M.Pog as well.

don’t worry about the credit – i just troubleshoot in my spare time, and the company is song/album/production based, rather than gear based. If you’re feeling grateful and have a buck or two to spend, buy some tunes or talk them up to your friends (or, hell, just have a listen).