Thanks everyone for the comments. Yes, that is my first celtic knot. I am sure my next dozen will turn out horrible.
To answer a few questions: The angle I set on the band saw was 45 degrees. The finish is 9 coats medium CA, sanded thru 12,000 MM. No plastic polish at all.
When I cut the kerfs, I used thin CA to saturate the cut, and applied medium CA to the beech wood. I spread the blank apart as much as I dared, without it breaking the last bit of wood, to slide the beech wood in. Squeezed it together and got good glue oozing out the edges. A few shots of accelerator and I moved onto the next cut. After all four sides were done, I applied thin CA to each of the visible edges of beech wood. Let the whole thing sit for maybe a half hour and drilled the tube. The whole process (not including the final dry time) took maybe 15 minutes - way shorter than I initially thought it would take.