PDP-11/05 core questions

Ok, I decided to dive into the PDP-11/05 a bit tonight. First I'm trying to make sure I have all the right boards for when the time comes to assemble the system. I have the two CPU boards (M7260 and M7261, actually three of the latter!), the M9970A SCL connector board, and two M930 terminators...so now I need some memory. The stamped silver tag on the side of the chassis says "11/05 SC" which I assume means it's got an 11/05S backplane in it. This assumption is supported by the board location sticker inside the card cage, which is labeled for a 16K core subsystem (H217, G114, G235, M8293). The problem is, I don't have that core subsystem...I have enough boards (in multiple copies) to put together an 8K subsystem, using H214 (or H215?), G213, and G110 boards. My question is, will this subsystem function in this backplane, or is the 11/05S backplane only compatible with the higher-density core subsystem? There's one other problem...The circuit breaker on the rear of the chassis is physically damaged. Does anyone have a spare one kicking around, or know of a currently-available replacement that I can order from a component distributor? Thanks, -Dave -- Dave McGuire Port Charlotte, FL