While making a toy for my Grandkids, I had a problem rounding over a narrow piece across the end grain. The grain was not exactly perpendicular to the cut, but more diagonal. The piece was irregular in shape so I had to use a guide bearing on the bit. Routing on one side was OK because it was cutting down the grain, but routing the opposite side was routing up the grain. It kicked back on me so bad that I had to finish the cut with a rasp. I thought of using a bull nose bit, but I don't have one. Does anyone have any suggestions?