The newly acquired P38 is fitted with a set of 19" L322 wheels and, from the shuddering at speed when I drove it home, I strongly suspected that no spigot rings had been fitted. These are needed to keep the wheels central on the hub as the wheel nuts are not conical and the hub centre on the P38 is slightly smaller than that on an L322. I've bought the required rings but if anyone else has fitted them, do the rings fit on the hub centre or in the wheels?

Wheels👍

That is what I thought too but having just been out there armed with a wire brush on a power drill to clean out the hole and a rubber mallet to knock them in, they just fell into the hole in the wheel. Probably Britpart engineering tolerances..... So I coated the P38 hub centre with copperslip and fitted them on the hubs instead otherwise they would have fallen out of the wheels when putting them on..

i bought some alloy ones, they fit snugly in the wheel, but sometimes remain stuck to the hub...

I've had in the past where tyre fitters have removed wheels and put them back on a different place, and ended up with two rings ramrodded onto the one wheelhub and another wheel ending up with no rings at all.

the spigot slips over the center of the hub but in time they will stick in the center of the wheel.
it seems that when you bolt the wheel back on the spigot will seat it self in center of the alloy rim

Dunno, these seemed a bit floppy in the wheels. Not a huge amount of slop but not a push fit as I expected.

could be as you say just a thousand of a mill out when fabricated
if I remember rightly the ones on my mates p38 wasn't a tight fit in the alloy they had a bit of tolerance