Rhodes Chroma Polaris

Hello I'm new here and new to the Polaris but it was an instant love affair <3!!

Only issues seem to be spongy keys, gritty sliders and noisy headphone output.  The membrane buttons are all functional however.

So anyway when I opened it up to air dust and deox the sliders I noticed some board mods/strange wiring so I stopped what I was doing and

I took pictures (will try and upload after)

Was hoping someone could highlight what is going on here as it looks very strange and I know nothing about synth techy.

Thanks so much, love the sound and want to keep my polaris healthy!

-Jes