@ Steve
In all honesty m8, anything other than a standard Install of an Amiga OS is a bastardisation in my book. Classic Workbench is rather clever getting the likes of Dopus to run on a 68000 CPU. That program alone requires at least an 020 to run.
These clever work-arounds are not always condusive to a stable & fully functional Amiga in the manner it was meant to be. Especially when you throw Elbox into the equation. They went outsoide the envelope with RE: to DMA. - Also, I'm not saying that you can't run Classic Workbench on a Mediator rig, but unless you have the core files in place for a stable setup, you could end up flogging a dead horse to get there. In your case here, it appears that way. :|
All the same, I'm glad you have had success with this project & it has been a pleasure helping you as best I could. A shame we're not neigbours as I could probably have set it up for you in a couple of hours. Even remote assistance in this manner has it's downfall's.
Now that it's working, back it all up & try Classic Workbench again. It may be okay for you, but be sure to use the right version for your hardware config.
All the best m8y & well done! :drinkin:
Charlie