I recently bought a set of the mentioned stud set from Retro Minis Ltd. that arrived here today. They are advertised as an alternative to the well-known ARP studs but less costly but not cheap with nearly £70 plus carriage.
On the enclosed photo you can see what arrived here today.
While the four long studs seem to be of good quality the rest is rubbish, not even the level of the standard studs. Heavy washers as advertised is not what I got.
I am very disappointed and absolutely not satified with the service I received. A complete ripp-off, I feel. If that is high quality Engish engineering as mentioned on the site of Retro Minis, then Good Night.
I wish I had saved the money and bought the real ones from Mr Gary Holzapfel & Son in California.