I have just acquired one of these and hope that someone out there has technical instructions regarding the additional sockets on the back and the DIP switches.
For review purposes, ergo-comp is dead. The site name is now owned by a tree pest-control company.
While it has individual switches wired in, and a more robust construction than the native Maltron, the switches are rubber domes (with Cherry-compatible stems.
I know this is a stale post, but hopefully someone out there has a user/technical PDF that I can download.