noel - the kenwood psr71s are a right b*stard to fit, i had some great fun trying to fit them into my mates clio, the only thing i didnt have a problem with was mounting depth
if you want to avoid most hassles stick to 13cm comps, when trying to fit 17cm comps it is very easy to destroy a door card (or 3) - i have found this out, and just ask tomclio1.2, he also suffered this same problem