I built the bottom shelf using the little wedges on the ends, glued a 1×1 cleat to the inside of each bottom stretcher (2 1×10’s glued and cut back down to 15″ wide), and screwed in battens across the shelf at 3 points. I finished drilling the 3/4″ holes in the apron, and in the top strechers of both legs (great idea there from Chris S. and company!). I order a new pair of holdfasts from toolsforworkingwood and cut some(4) 5″ lengths of 3/4″ dowel for support posts.
The posts fit a bit too tightly, so I used my favorite turning tool – chucked the posts on the lathe, and added a tiny taper to make sure they fit well.
Last but not least – I flattened the top – using a #6 plane, sharp blade and some canning wax for lubricant. It took about 45 minutes to bring it to flat enough.
Thanks again to Chris Schwarz for bringing out the plans and the parts lists.