Finished the DreamCast board for this project. Original fan moved out of the way, controller daughter board screwed onto spacers, RGB wiring done and wires secured, going to use controller cable as makes it easy to remove if need to, drive unit completed. This is ready now to install into the Unity system, ie wire up the audio/video and power; just need to do a bit more work on the controller and wire that into the Unity system, then testings.
The DreamCast section is screwed into a piece of 6mm thick board, that will be screwed into the side of the Unity casing and be located there. Trying to make this system as easy as can to get to all boards if need to do repairs in the future. Only hassle will be if the PlayStation 2 needs the lens cleaned or whatever, that will mean removing the Saturn (sitting on the NeoGeo and secured by a couple of screws) and the NeoGeo which only has a few screws into the Unity casing; so not hard. The more systems installed, the more relevant things like "what if I need to get to the bottom system" becomes ever relevant!
I then will test all the systems again, as had to make the changes before for the shoulder buttons, before moving to the GameCube.
When I started the project I was making videos for each system, that's a bit overkill I think, so i'll probably not do another video until all the units using drive units are installed and done, ie after the DreamCast, GameCube and CD-i (if using) are installed; then another video will be about the cartridge systems, the development of the casing to make it look pretty, etc.