[jambo]

I've just wrestled with this one as I have an older Viper GT, and just got hold of a Chaser V, which of course uses a different visor system (naturally I didn't check that first).

In the end I just plummed for a new tinted visor & pinlock from racevisors.co.uk. The knock-off ones may well be fine, but this way I've got an easy come back if it's not spot on. Turned up a day later and fits fine. It's very tempting to give the cheaper ones a go OE visors cost a fair bit!

Jambo