Scoop is a complex routine by Bill Gilliss. It improves on the standard Subtract command in the following ways: Scoop subtracts from copies of solids instead of the solids themselves and avoids unioning the solids from which they are subtracted. It also changes the current layer so that the results end up on the correct layer. Bill also claims that even with all these changes, the routine is faster than the built-in Subtract command. I did not run timed tests, but it is certainly not any slower. This tip requires AutoCAD 2000 or later and is a good example of incorporating external functions — in this case, functions from an Express Tools ARX file. Load the LISP file and start the command by entering Scoop at the Command prompt. Thanks for sharing your hard work with Harry fans, Bill.