if u dont trust a garage to not rip u of then diy it its not a complex job

i live opposite a national tyres garage , if i ever need a litle job doin wa i cant be arsed wiv lol then i just go over on a sunday wiv a litle bit of cash :P , wen i first got a car they fited a back box for £20 quid to my litle metro lol those wer the days