I checked 5/11/06 E-CBOT volume for June Gold. It was 54,409. COMEX volume for June Gold was 85,404. Open interest in COMEX is greater than CBOT by a wide margin. I traded both exchanges today on 5/12/06. Slippage wasn't bad on the COMEX, considering it's open outcry. Both contracts, ZG (CBOT) and GC (COMEX) are the same size, being 100 oz. Thanks.