To be honest, if it doesnt fit etc then the manufacturers/ sellers are plain stupid - would they not have simply bought a forge and had it copied?
Or, is this another case of hating something as its half the price and made in china? -how much does a tip costs to manufacture?! - i bet its well under £10.00 maybe much much less, someones making big money out of us.
I have a friend who has silicon coolant pipes made for another manufacturer of car, they are upto the standard of forge/samco stuff for sure.
But yes, qualitly control issues are common in china so i wouldnt be suprised if it diddnt fit as well as expected really!
Rick