Also see: Lowering, which focuses on B110, but most information is also applicable to B210.
Using B110 strut tops in a 120Y lowers the front by 1 1/2". The PCD is different (slightly) so I knocked the studs out, elongated the holes with a die grinder, put the 120Y studs in. Gave them a zzzap to stop the moving during assembly. The hole the in the B210 strut tower needs to be opened up, I used a set of vice grips. Went a little at a time, about 4 times around.
120Y lowering on the cheap