Arnage T tappets

[WightGT]

I am looking for an Arnage and there seem to plenty of T available. However, I am aware that there were tappet and head gasket problems in the T versions. One seller is suggesting that these problems only affected the early T, but my own research suggests that the problems were not eliminated until the 2007 model. Anybody know the full story ? Finding a car where the remedial work has been done, with receipts, is proving difficult.
Many thanks for any help you can provide.

[WightGT]

Thanks Denis, this is much as I thought. I don't think the Arnage R had the same head gasket and tappet problems of the T, and I'd gladly have the R if I could find one. In that way, I'd avoid buying a car with a looming problem.
best wishes,
David.