hi guys, on the mk1 punto, i've started getting an extreme vibration (steering wheel is actually turning 20 degrees from left to right and back) it lessens when i turn left but gets worse when i turn right,

i'm thinking i might of knocked a weight off,

what do you think??

A wheel bouncing at low speeds it more likely to be a tyre bulge that's about to burst.
Get it jacked up and properly looked at before driving another yard.