I need to ship 2 2226 cores and want to ensure they get there and then back. I planned on installing bolts, nylon washers and nuts onto the drivers being face-to-face.

My boxes are 275 lb test rated and are going to be 18"x18"x18" (1/4" wall with UPS recommended weight capacity up to 80 lbs.)

Industrial duty bubble wrapped with 1" foam installation top, sides and bottom.

Does this look like it will work for 2 2226's? Should I use plywood and 2x2 wood corners?

Yank