Just drove into work still flickering/pulseing ever so slightly on drivers side, had this reply from HIDS Direct;
Hi there it could be however its more likley to be the canbus down one side thats causing it on the vec c
All you need to do is try a few things to get it going. If you fit the kit with no capacitors first see if that sorts it. If not swap ballasts this will confirm if its a ballasts or the canbus
Also if the caps off is doing the same plug both caps into each other and fit them in line down the flickering side this usually sorts the problem. so it would go ballast - cap - cap - bulb down the problematic side.
So bumper off again tomorrow (I can do it in less than five minutes now )
One thing I have noticed is that the light seems to start up bright, dim then slowly (within 5 seconds) come back to normal brightness, is this normal with HIDS?