"Daisy" chaining hardware keyboards

[Constructed Identity]

Has anyone attempted to connect the analog output of one keyboard to the analog input of another keyboard and then connect the second keyboard to the analog input of an audio interface, in order to use the sounds of both keyboards?

I know having an audio interfaces with more inputs would be beneficial. But I don't want to buy another interface right now.

I know it would be better have a digital (maybe ADAT) daisy chaining instead, but one of the keyboards doesn't have a digital audio input.

I want to be able to combine the sounds of a Genos and a Kronos and maybe some virtual synths as well.
I have a Focusrite 2i4, a Kronos and a Genos.
So I was thinking Genos goes into Kronos goes into Focusrite goes into computer.

Was thinking to use the headphone output of the Genos as well, cause I've got a splitting cable (unbalanced) that could fit into the Kronos. Because... why use 2 cables?

Genos has unbalanced outputs, Kronos has balanced outputs.
I realize: DAC Genos, ADC Kronos, DAC Kronos, ADC Focustrite, DAC Focusrite, Amplifier, Speakers.... is a lot, but is it really a problem?

Yes, I know I'm a cheapskate...

For the last few months I have had my Odyssey above my Sequential Pro 3 for various combinations... Pro 3 has a vastly better keyboard so I control the Behringer with it, but also use its sequencer to play both... I get really nice complex sounds with both playing on top of each other, easiest with behringer's output into the Pro 3's input. Probably better with both going into their own mono inputs on my sound card so that the filters are more separated for evolving sounds. Honestly, this is my dream synth texture. I have thought about doing a YouTube of it but need a holder for my phone/camera.