I'm about to start milling wood for a workbench but I have a couple of ideas holding me up. The first is that a lot of benches I see have an apron / trim around them that covers the end grain. I'm worried about wood movement breaking apart the apron or causing the bench top to bow. Is this something to be concerned with? How do people plan for that? Is it OK not to cover the end grain for will I get more movement in the top that way? I'm thinking about leaving the endgrain exposed or adding an apron but securing it with bolts/oversized holes. Suggestions?
I also can't decide on square holes vs. round. I lean towards square. Has anyone had issues with round holes that have gotten out of shape? Are they still useful after that?
If it matters, I'm recycling some rough cut 4x4 stock that has never been pressure treated. It's all ash. I've also read group archives but could use some fresh ideas. Especially about the apron.