I purchased a 2004 GTX 185 a couple of weeks ago and it had 132 hours on the clock. The PO said he had not had the sc rebuilt. I purchased a new 2014 spec sc. I noticed it had a small (may be 1/8 or 3/32) hole in the case just in front of the 2 o rings that keep oil in the engine. I looked in the hole and could see the sc shaft. I'm guessing this is a later design for better lubrication of the shaft and bearings? Should/could this hole be added to the old original sc when it's rebuilt?