@g4dbn @jmorris Oooh, shiny (literally).
I've never done any waveguide or over-the-air stuff myself (I generally am working with baseband communications stuff, trying to keep my microwave signals ON the board) but have always wanted to fool around with it.
With my instrumentation I can at least somewhat operate from DC to Ku band so any "starter stuff" you might be able to make in the WR90/WR75 so I can play around with 3cm / X-band amateur stuff would be cool. SMA to waveguide transitions, horn antennas, etc.