Wayne Parham Messages: 18756 Registered: January 2001
Illuminati (33rd Degree)
The depth of the dado for the access panel is actually one of the few cuts that isn't all that critical. The proto and first models were all 5/16" deep. This makes the access panel flush with the side when the gasket is 1/16th", just like you said. But a deeper dado lets the panels be slightly recessed, and that works better when stacking horns on their sides.