uVax II questions

Howdy, I've taken delivery on two MicroVax II's, one is a model 630QY-A2 and the other is a 630QB-A2, the QY is basically a narrow cabinet and the QB is a wide cabinet. Both have 8MB and both have ethernet controllers. Both were stripped of drives although one still has a tape unit. (TK50? How can I tell?) Here are the questions: 1) I'd like to find a disk or two for these (they each have slots for four disks of the DU type.) what do I need to look for? Are there size limitations? 2) Can these things be booted over the network in a pinch? (one has no tape drive) 2b) Do these things have boot roms that are interactive ala ODT? Until I get disks is there anyway to verify that they work? 3) Would it make sense to combine the memory cards so that I have one 16MB VAX or should I leave it at two VAXen? 4) One has a busextender unit that goes to a non-DEC disk card labelled: "Wombat" (its a disk controller of some sort) with tag WQESD 2.8M SCD-RQD11/EC a) This is ESDI controller yes? b) It has four data connectors so four drives? c) Its in a different backplane UNIBUS perhaps? (quad height) Both machines internally appear to be in very good shape. Anyone have the "MicroVAX II 630 QB Technical Manual" ? All in all it wasn't a bad deal at $18 each. --Chuck