U should defo give another go I know u can do it ha them garages will charge u stupid money it would worked for u I made exact same mistake first time usin any o rings but once use ford genuine job worked good luck with it fingers crossed for ya haha hope ur hands ain't to badly cut haha
Cheers mate and thanks for the vote of confidence I've ordered the genuine o rings now £2.59 + vat EACH!! For a little bit of rubber which probably costs them 5p to produce. I nearly fell off me chair when the guy told me the price. Anyway, I've managed to blank off the heater matrix, so the car is useable, just won't have any heat in the cabin, and in this cold snap it's gonna be missed. So I'll pick up the o rings tomorrow and have another try at the weekend, I just hope this dry period holds out until then.
With regards to my hands mick, well it looks like I've been self harming. Little scratches and nicks all over the back of my hands, I just see them as battle scars