I took this picture a few weeks ago, but forgot to post it… Here’s exactly why I ended up going with the split-top design. You can just slip your piece around the front part of the bench and grab it with the wagon vise. Bingo-Bongo, it’s not going anywhere.
Honestly, this drawer was a little huge and awkward, and it still worked really well. Sliding smaller drawers and casework around the back and clamping it down for finish planing is going to be a complete joy.