Tony D. wrote: Interesting coincidence. I was digging through some boxes of stuff yesterday, and I came across two sets of these in really nice condition. Haven't tested 'em yet (had /no/ idea that they could be used for diagnosis of an RX01 control board) but looks like they should be pretty simple to check out. I had didn't know of the existence of these before yesterday. I did a little searching and found that they are useful for debugging 11/35 and 11/40 systems, as well as RK05 drives...but didn't see anything about the RX01 drive electronics. Speaking of RX01's, does anyone out there have a spare front bezel for the RX01 that they'd be willing to part with? I have a working RX01 on my 8/e system (both drives good, amazingly) but the bezel was missing when I got it. It'd be nice to have, as it looks rather dumpy in the rack with the rest of the system. Best wishes to all, -Rick -- Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com Beavercreek, Oregon USA