This might be a bit of a stupid question but here it is. I bought a Krause offset 1482 model. 13ft or so. Anyhow on the right hand side the main frame has 3/4" or so holes with a pin that drops into them that keeps the gangs from moving backwards. Now these are also held in place with big clamps. I see other kinds that do not use the pins. Are they prone to sliding?? I am going to make some caps to go over the holes out of plate steel to keep dirt and water out, I cleaned it out and want to close it off because it will rust it out badly. And if I can get by without the pins I can cover all the holes.