When I bought my Plus8 there was the chirruping sound during the test drive (not a new car). A well documented issue in GoMog in the Plus8 specific section.It was sorted by Berrybrook but did come back a year later. I removed the ribbed belt ( it looked new) , cleaned it and used brake cleaner sprayed onto a cloth on the pulleys. It has not come back since then. Belt is still looking very good with no signs of cracks etc.The Plus8 fix in Gomog was to use a 1mm narrower belt, I think.
