It's the RK11-C... there's a single slot facing the front of the rack that I expect is where it goes. The RK11-D is a quad backplane thingie that goes inside a BA-11 or some such (and the RKV11-D is a version of it that fits in an external 4-slot enclosure with a set of cables and a paddle card that go to a host's Qbus. I'd be interested to know what _other_ peripherals have a KM11 slot. I personally want one to debug my RK11C (even though I am usually using my RK05s with the aforementioned RKV11-D) just for the sake of doing it. I do _have_ at least one RK11D that I could use for "real work", but I'd like to get the -C working nonetheless. -ethan