Fitting carbon spats

Just bought some carbon spats fr my 200 (the ones on ebay that most people seem to get)

They have come with 6 screws as well as the double sided tape on and I was wondering if most people have bothered with screwing them on or just used the double sided tape?
 
yeah that's what I'm thinking as theyve got strong double sided tape all over them but on the other hand cant be bothered running them over and having to buy more lol
 
I think I'd go with the bonding too. That way if you change your mind down the line you aren't left with holes in the bodywork....