I restored my 1940 B last year and replaced the rings amoung other things. I returned the cylinders the way they came out by making sure the connecting rods had the stamped #1 and #2 on the up side. I noticed the holes in the oil ring slot were on the bottom of the cylinder. I recently learned that the holes are supposed to be on the top. My question is whether I need to tear apart the motor to correct this when I run the tractor about 20 hours a year for parades and a few tractor pulls? Is the purpose of the holes to drain oil away from the top of the cylinder ? It seems that the oil can run down around the cylinder quick enough. I tried to find informaton on Pat Browning's site but didn't find anything about the purpose of the holes. Though I was impressed with the description of the oil pressure and lubrication principles. Thanks Pat.