11/44 RSTS/E Sysgen

I am preparing to sysgen my 11/44 system to expand the device drivers available... specifically to get RL02s installed, secondarily RK05s, PC01s, etc. I would like to know if anyone reading The List has ever done this particular operation, and if so, are there any pitfalls, booby traps, and/or gotchas that lurk waiting to sink (more) fangs in my tender derrier.... ? All day today I have been tracking down a problem with my Kenndy 9100 system... it fails when writing long files, and locks up with a 'device hung or writelocked' error message. At first I thought it didn't like the RL11 card in there, so I de-installed that, of course no change. I believe the 9100 itself is wanting a ramp-time adjustment... I can do it, have the tools/docs, but the labor is enormous and I would like to avoid it for now if possible. Does the sysgen process write to the tape? Or just read from it and write to the disk? The Kennedy reads fine, it's just recording that's flaky. This came about as I tried to make a master backup of the system to a fresh tape.. "BACKUP" seems to work, but "copy *.* ms0:" screws up at random places... except for once in a while when it completes with no errors. Any RSTS/E Sysgen advice? Happy 4th... Cheers John