I already have post of this. Don't read you other threads?
http://www.modelcarsmag.com/forums/index.php?showtopic=6458
Yea, I bought several of the Jaymar 1/16th scale items years ago. They are a far cry from the Colin Grey originals. I have been bashing them on forums for years and they finally respond to me over ten years ago by sending me an updated version of some Kenworth T600 fairings they made, that I bought originally. The originals were so brittle that when they arrived from to me in Florida, from Australia, by ship, 6 months later, they were in pieces, like corn flakes. He supposedly changed the formula of his casting material, which wasn't that much better. I don't know why his quality sucked the way it did. Didn't he have access to the same resin material the USA, Canadian and British casters used?
Ken Smith had articles in Car Modeler magazine that showed how to detail the 1/16 scale engines Colin Grey offered. The original parts by Colgrey components were top quality. I have never seen the originals for sale since then.