Im sure one of the engine guru’s will be on to advise but I reckon it’s worth a giving them a go and would be good to report back.
Coolair are doing the kit on sale for £309.00:
https://www.coolairvw.co.uk/product/025198075ap/
Coolair have an online chat facility which is fantastic as I’ve gotten plenty of advice off of them for parts for my Beetle. I’d use this on Monday for advice and if they can give some information on previous testing.