Yup, I forgot what size I used, maybe 3/16"?
Here is a how-to I found, I pretty much did it the same way...
http://www.contour.org/forums/ultimatebb.php?ubb=get_topic;f=7;t=000587
It's not much fun, but if you already started chipping away it, you don't have much of a choice...
It looks really good though...but I'm not sure how durable mine is going to be. By durable I mean how well the chrome ring is going to stay connected the black one. I used a lot of welding adhesive...but it still bothers me. I'm positive it will stay put for awhile, I just don't want it falling off two years from now
