I migrated from a hardwired Radionix system to the OHS. Since there were a _lot_ of wires, I decided to mount the OHS next to the current system, move each wire and test it.
This is a picture of the two systems next to each other and the nightmare of wires. I had to remove and re-wire them again once I removed the old system board and box, so I was not as concerned about how they looked then.
Here is what it looks like after I removed the old system and rewired it. This was in April and the system has been running since.