Think i need to add,
My struts were too powerful, and needed a nudge of an inch before flipping open. I pulled out eventually because i refered to my bootlid as a "self righting mechanism" if ever i flipped the car over! I beleive it can be done but id need about 500 quid to find the EXACT specification/combination of struts, bumpers and ball pins.
For some reason i got the same spec as other people but results differed. Excellent mod though!!