I went to talk to Rolf and Jay this morning. I asked Rolf if a chassis was available, so he went over and disconnected one of his test stand chassis and gave it to me. It comes with a Contect DIO-1616L-PE Isolated Digital IO board and an OSS-MAX-EXP-ELB-C, which is a host interface board. The OSS board means it has to go into the south end station. There's a very short maximum cable length associated with that style, and the LSC and IOO chassis will be further than that from their computers (we have dolphin connectors on optical fiber for those connections).
I also asked Jay for another 4 port 37 d-sub ADC blue and gold adapter box, and he gave me the pieces. While over there, I took 2 flat back panels and punched them with approriate holes for the scsi connectors that I need to put in them. I still need to drill 4 holes in two chassis to mount the boards, and then a bit of screwing. Shouldn't take more than an hour to put them both together. At that point, we should have all the adapter boxes necessary for the base design. We still need some stuff for the green locking, as noted on Friday.