For all those people out there who need to do this but don't have the funds, here's what I've done instead of changing the whole control arm, I tracked down a knocking noise the other day to a failed ball joint, being a cheap skate I couldn't fork out for the full control arm, so shopped around and bought the ball joint itself for an almighty £12.50... what a PITA it was for fitting but got there in the end, there probably was an easier way to do it but I'm a derrr, anyways I started by securing the car off the ground!!a big must because I'm paranoid enough as it is lol...cracked the ball joint nut so I wasn't fighting with it later and you'll see how the original joint is fitted to the control arm, it looks like it's held together with some kind of pins, infact they are a pin which has been squashed to form a rivet, grind down the bottom of the pins phlush with the ball joint bracket and then drive a chisel of some sort (I used a joiners Chishel to start with then a bolster chisel) through where the joint meets the control arm, when that's off get your pickle fork and separate the joint, knock the left overs of the pins up and your all done...for new joint do in reverse of what you've just done but I had to lift the brake disk and hub with a bottle jack to line up the new holes and bolts,
I know ive rambled a little but it may help a few others out there as I searched and searched the net and couldn't find a thing on doing it like this let alone doing anything to meg 3 1.4 tce :O I've took pics of the before and after but didn't take any in between as I was too busy stressing and swearing, well deserved 0% beer for me lol