Neat idea MrR...
Some construction tips (eg. Domino/M&T/dowels etc...) might be a tad informative for plagiarists. Is it on wheels?...
Is that middle part a removable "plug" so you can lift it, sweep the scraps off the table through the "hole", and put it back leaving a clean table?
If your first cut is too short... Take the second cut from the longer end... LBD