Here are some shots of a customer's 52 short bed where he used a different approach. He removed the two "L" shaped side rails, cut a floor out of a 5x10 plywood sheet (it's available), screwed the rails to it with button head screws, and finally panel bonded the side rails back on. I wondered about expansion/contraction but it was done in 2015 and still looks good.

[img]https://i.postimg.cc/xcwM0sdS/Mikes-bed-003.jpg[/img]


Evan