This past Saturday, Triangle Woodworkers held their annual Toys for Tots workshop. In the process, they drilled 500 one inch holes in car bodies made from 2 X 4 stock. That's the same as a 1 inch by 62.5 foot hole. Using my Top Hat Thien Baffle, connected to Delta AP-400 dust collector. The lower bag on DC contained less than a half gallon of fines, while Thien Baffle caught the rest. Pretty good for a shop made baffle, IMHO. To see baffle, search "Another Vote for Phil Thien's Baffle."