So boing bag 1 went great. Had to mount the iso to make it work, but thats okay. SOmeone on EAB had a simple little script for it.
If someone is looking to do this install without a CD rom btw, its not really so bad. I;d be happy to explain how I went about it.
Boing bag 2 broke my system.
An hour of messing around with versions of set patch, different startup-sequences etc finally got me back working. It didn't help that the only workbench disk I had was an old workbench 2.05 disk

It seems the rom update was the culprit. The installer actually warns that its dodgy but I guess "unlikely to fail" meant "runequesters amiga will break"
Once that was sorted out, everything looks fine. Its not even that slow either. Certainly no more than 3.5.
Amplifier actually works, which is amusing, though sound quality is.. well, not amazing

It is SLOOOOW to move around with the skin. Without it, its snap enough. Definately a use for RTG there.
Dock is nice and easy to add stuff to, and looks decent even in 256 colours.