I've glued together the two halves of what will be a split top roubo workbench. Now flattening is required. They're heavy. Too heavy for me, working alone, to easily take anywhere to be thickness sanded. They're hard maple, planing isn't a great option because of the risk of tearout.
What I'm doing is using my belt sander for the task. It certainly doesn't seem like an obvious choice. It came to me to do it that way when I recalled having built the bench that is the cover story in issue #50 of Woodsmith magazine long ago. In that issue. The central slab is flattened in that manner.
Remarks? Pitfalls to be aware of?
Maybe I ought to make the effort to get them to a proper thickness sander to ensure uniformity between the two halves.