I would like the ability to remove the benchtop (comes in handy if I ever move to another apartment). The bench is a work in progress, though I don't have complete plans for it (I'm undecided on what the base should look like). It's made from 2x4's stacked side by side with the 4-inch faces against each other. Traditionally, I've seen it assembled using mortise/tenon with glue for permanent assembly. I'm ok with using lag bolts but is there any way to install them so they won't protude from the benchtop?