Polos are a nightmare. When i had a 53 reg, i decided to upgrade the headlights. Went in via the "small hand" method, but once they are put back in i drove to Newcastle the next night only to turn them on and they were all over the place! Took it to a dealer and fixed free of charge - aparantly they are terrible to adjust.

Oh and keep a first aid kit handy - when it happens you'll know why.