Was checking out my new Domino 700 XL today....My problem was, when I took the unit apart the larger of sleeve assembly met much resistance in inserting the male end into the female when reassembling. I did put sewing machine oil on both male and female assembly. After much aligning and re-positioning and a little elbow grease they finally went back together..... Is this normal or does anyone have any suggestion to assist in a smoother reassembly?