id recommend adding these things one at a time. Otherwise it gets hard to keep track, if you apply 4 or 5 things, then suddenly have an unstable system
No doubt.
I've got a bunch of folders on another drive with copies of the SYS: partition after each thing I install.
For example, I installed Poseidon onto a ClassicWB 3.9 install the other day and it completely blew up, wouldn't boot with startup-sequence.
It took me forever to find that the input device line was added in the wrong place in the startup-sequence (above the comments at the top!) since ClassicWB didn't have the particular line Poseidon was looking for.
The backup saved the day on that one.