For the Aerotech 38 mm plugged forward closure (normal with delay grain used as a smoke grain, not the endburn closure), are the delay o-ring and neoprene washer used? I cannot seem to find instructions and cannot manage to understand how these elements would even fit. Since there is no ejection charge and it's sealed, I don't think they are necessary. However, I also don't want a CATO.
The inside of the forward closure has a recess where I believe the delay grain fits into in place of the delay o-ring, and the stepped surface doesn't even make sense for the neoprene washer.
The inside of the forward closure has a recess where I believe the delay grain fits into in place of the delay o-ring, and the stepped surface doesn't even make sense for the neoprene washer.