So bare perfboard it was. The four headers were temporarily superglued
onto the board, so they wouldn't fall out when the board was turned over
to do the wiring. Under the board, I ran a common ground bus of
18SWG/16AWG tinned copper wire around all the headers. The other small
components were pushed through the holes, and anchored by their leads as
the various connections were made.
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As far as superglue is concerned a warning !

Superglue is Cyanoacrylate , which if heated releases a very nasty gas which
really 'hits' you when inhaled.

Recently I superglued a component before doing some additional soldering
work around that component.
I now know I shall NEVER do that again.
Superglue is fine but not in a environment involving heat at soldering
level.

Frank GM0CSZ / KN6WH