Scouting around (plagiarising?) published designs for HR RXs and sundry
boatanchors, it seems that where there are tuned RF stages, then 2 tank
circuits seems to be the norm, and then only 3 ccts if the RX IF
is ooo 455kHz when the coverage needs to extend to 30MHz.

Looking at the rate of progress here (or lack of it!!) I am trying to
conceive of a scheme to use up all the tuning condensers (capacitors
only came in AFTER some of them were manufactured :-) ) in
the junk box in one final big push to releve the executors of my will
of difficult decisions :-)