<Hmm, if the RLV11's go into a ABCD backplane, and the BA11 is such a <backplane (18 bit all 9 slots have CD connected) could you plug a backplan <into the BA11 using one of those extender ables (two dual connectors on <each end) ? Yes but your still limted to 256k of ram (not a big problem) and you must follow all the bus grant rules! It does work. Allison