I also have a retina installed here.
It is running with a cyberstormppc with a 060 processor.
Z3scsidevice is here 5.1034 as I have no scsidevices attaches at the moment I can't tell it should not work.
Does it indeed give problems on the 060?
The memory is working allright here.
If it does effect I may also be interested in a newer rom.