Luftek's case looks beautiful. Before I saw these messages, however, I went and bought a somewhat larger case, also extruded aluminum with a split body so one could attach front and rear panels to the bottom, and fiddle with the LimeSDR PCboard with the top of the case temporarily off. The case I bought is this one:
It is 120 x 97 x 40mm, so noticeably bigger than either of his versions.
My intention was to go one or two steps steps further than the 10 Rx/Tx ports and the RefOsc IN port: bring out both RefOsc IN and RefOsc OUT to SMA connectors, and maybe also bring out the pin headers for GPIO's and JTAG using insulation-displacement connectors and ribbon cables. I had not gotten to the point of considering how I would machine the front and rear panels with all the needed holes. Sure, round holes are easy with a drill press, but the other shapes would need a steady hand on my Dremel tool.
Looking at Luftek's solution, it dawned on me that his idea of etching a PC board and having the fab house cut out the holes would probably be far easier than my reaming out the needed holes in the aluminum panels. I suppose if those boards are two-sided and the back or bottom side is solid copper, then decent shielding against the aluminum case would occur. (Since I went with a black case, I suppose I'd need to sand the front and rear edges of the top and bottom case parts down to shiny aluminum to insure good electrical contact.)
One of my other thoughts was to imitate a trick used on my DownEast Microwave transverters, namely to space a Tx and Rx pair of SMA connectors so that they line up perfectly with an SMA relay, so a T/R function on a single antenna could be managed. Then I got to thinking, "Which Rx? Which Tx? There are so many choices!" Then I came to my senses -- any real-world Ham application is going to need external filters, a low-noise preamp, and at least a QRP-level power amp to use it, so I might as well keep the Rx and Tx connectors to feed preamps and power amps respectively, and worry about T/R switching elsewhere (external).
Oh well, this IS a project for EXPERIMENTERS after all, right? And, I must add, "Many thanks for the inspiration!".