First of all, many thanks to Tom Waltz, who sent me 2 Whiteside router bits to test:
1376B Bowl and Tray Bit (reviewing now)
1411 Round Nose Core Box (trying and reviewing later)
First of all, I am very grateful for Tom's kindness. I started using Whiteside bits after the 2007 Fine Woodworking comparison. The Fine Woodworking test named Whiteside Best Overall and Best Value. I buy them whenever I have a choice. As a hobbyist, I have not worn any out or seen any degradation in performance in any of my Whiteside bits.
The 1376B Bowl and Tray Bit looks and feels substantial. It has a bearing the same width as the bit - 1-1/4". Shank is 1/2". Radius on the edge is 1/4" so it has a flat cutting spot of 3/4".
The only challenge I experienced was that the bearing starts about 5/8" from the cutting end. My template was made from 1/4" ply so I started with a plunge cut near the middle of the piece. The router was mounted on a 16" x 6" piece of ply so it could ride the edges of the highchair tray template.