Even though I cancelled my G4 1000 upgrade, it ended up shipped. Gave it a spun and got no boot. It seems that the new upgrades are designed for B&W's that are stock G3's, no firmware upgraded G4's. Sonnet tech support acknowledges an incompatibility between existing 1.1f4 firmware. My B&W firmware was upgraded with the XLR8 firmware long ago and this has created the upgrade issues. Does anyone know how to reverse the XLR8 firmware? Could not do with the XLR8 software and Sonnet software can not remove (however they are working on this. ETA=?) If I can reverse the firmware I may be able to get this upgrade to work if not, 30 days to return.