The pillow block / mounted bearing would protrude way past a 1/4 inch clearly ceasing to be minor even in the most liberal reading of the rule? You then run into issues with 1/2" support on either side of the vertex as well.
In the past (Just for you Al
) In this case the rule wording is similar though. We drilled thru holes in the bumpers to give clearance for axle bolt heads. 1 inchish Dia to allow for sloppy location. The little decrease in plywood strength was more than made up by solid contact with the frame.
Does gussets fall in the minor protrusion category assuming the gusset + rivet is less than 1/4 inch?