lumberjack
Young man on the go
If it were me, I'd go with 3.5"x3.5"x.25". I'd also rebuild the attachment plate so the larger tube can go to the base of the plate.
A single 5/8" hitch pin should be enough to make it adjustable, although 2 wouldn't hurt.
A single 5/8" hitch pin should be enough to make it adjustable, although 2 wouldn't hurt.