The countertop sits right behind the kitchen sink and its stone backsplash. I sealed the 1/8" gap between the backsplash and the Bubinga with clear silicone caulk.
Here's a view from the Dining Room looking toward the countertop and the kitchen. The reflection off the drywall below the countertop is from Lexan I installed to protect the wall from being scuffed by careless feet sitting on stools...
My key issue was getting the 3 angle supports at the right height and coplanar with each other and the top of the stub wall (it was -- thanks to carefull use of a 4' level when installing the vertical members!). Less than 1/16" error which was taken up with a bed of clear silicone caulk on...
The angle piece tenons were glued and the top support dovetail pin lowered into the tail cut into the vertical. When seated, the brackets were at a perfect 90º angle and the tops flush with the top stud in the stub wall. I drilled holes into the far side of the horizontal and vertical members...
Both sides and all four edges were sealed with two coats (sanded with 320 grit and tack clothed) and then a final top coat of varnish -- one more to go!
After taping the mortises and dovetail glue surfaces, here each component has received two sealer coats (50:50 Varnish:Reducer) and one final full-strength coat of varnish -- one more to go!