Bought my used 1023E a couple weeks ago. We had a dickens of a time connecting the mower, which has auto-connect. I had to reach underneath and hold the receiving bearing to keep it from flopping around. As I looked around this forum it appears that there is an adjustment bolt that keeps that bearing/spline in alignment. I assume my JD dealer would have that? See picture. I think the head of the bolt should rest against the cross shaft to the rear of the bearing. Right?