I know some people have trouble with Fastlane SCSI in the A3000 (conflicts with the motherboard SCSI???), though the memory side of it works OK. It should work OK in the A4000 with 68060.
It's supposed to work irrespective of the Buster revision, the Fastlane board is supposed to have a workaround for the Buster 9 DMA problem which was fixed with Buster 11.
You'd have better performance using the UWSCSI controller on the CyberstormPPC board as opposed to using the Fastlane's narrow SCSI controller.
Still, you can have a new Fastlane EPROM if you like. See above.