My house is using a 2 year old kegal unit, which seems to put a rather erratic pattern. One day, the shot is fine, on another, releasing the ball at warp 6 may keep you near the pocket. We use "control" as the oil of choice. It was chosen at the advice of the applications person when the Kegal arrived. The pattern is tapered, oiling, at least what is programed, to 39 feet forward, 37 in reverse. On those "strange days, the oil pattern looks scattered and blotchy, if that makes any sense. We did try to bring the shot down even further; but the back-ends were non-existent. The patterens in the book actually call for shorter patterens; which is a very bad thing.
Any advice or comments out there?
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