yes, a "dry fit" is always a good place to start ... problem with shaving the sides of the boards is the spacing of the grooves for the skid strips needs to be just so or the skids won't lay right, and if yours is too tight just at one end the grooves won't be parallel, maybe you need to spread the bottom of the bed sides a bit at the front?

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics