Seating. The maximum height for any form of seating is 150 mm (6”) when flattened between 2 boards. The seat may only be used as an aid in sitting or kneeling shots.
From memory the EFTA said 4". Can't be certain.
Personally I think there should be a box. It fits with lid closed or fails. And shooters should only be allowed one.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep