[chrisso]

I had it done on my grey face Arp2600. I can't remember what the guy did now (we followed the CMS concept though). I think a few very simple components were changed for more modern ones.
We reduced the background noise in the synth, but the bass wasn't noticeably different.
I really don't think you would notice it.
The 2600 became a tiny bit clearer and warmer.....tiny.
I'm surprised you think the Oddy lacks low end.