I did a third alternative. Take a hair dryer or heat gun and warm up the area where the leg is too close. Use a pipe of appropriate diameter and press the area in as you apply heat to invert the edge of the fiberglass portion of the air box. Way easier than re-glassing the area and is outside the area of the filter element. I dented mine in about an inch. Worked on my 7A. Never had an issue.
Built/Flew an RV-7A
Air Troy Estates, East Troy, WI
Ford Expedition and TRICE "Q"
Built Glen L "ZIP" Classic Outboard Runabout and Super Spartan Hydroplane
Glen L Torpedo