Michael: first of all, congratulations for obtaining an almost complete 19 set station...now you'll be on the hunt for 20' and 34' masts, horizontal aerial sets etc etc etc. I highly recommend Louis Meulstee's book on British Radio Sets. It has a fairly large section on 19s, including check lists, antenna arrays, etc etc etc. for really great reference material.
If using the No 5 cover,(and perhaps any canvas cover) you''ll have to relocate the vario to the side, not the top as shown. Also, depending on installation you might mount the crystal calibrator on the left hand side and mount the vario elsewhere.
Lucky bugger!