[ROVERNET - UK] 1930s radiator alignment

[Alan Gale]

Has anyone with P<4 experience cracked the secret to radiator alignment?
I cannot get the radiator on the Rover 10 to sit happily in alignment with
the bonnet (hood).
No matter how I adjust it, it always seems to settle itself so that it is
not parallel to the bonnet front, but is at a slight angle, so one side of
the bonnet rests firmly against the radiator surround (awakening fears of it
slowly chewing its way through) and the other side is about 5mm clear.
The radiator rests on a rubber pad, is connected to the engine (and
therefore subject to some adjustment) by radiator hoses and is linked to the
bulkhead (fire wall) by two rods which give "fore and aft" tilt adjustment
to the radiator top.
Then there are the two rods coming in from the mudguard (fender) brackets
which bolt on to the radiator at either side.
All other pre-war radiators I have dealt with have had some sort of solid
mooring at the base which can be adjusted.
I have tried several times the method of slackening off all connections,
getting it all aligned and then tightening up to that setting ... no
permanent joy.
Is there something from the bleeding obvious category that I am missing?
Alan Gale