I had the same problem when I did the cross member on mine Les.
What I did was undo the two/four big bolts, put the bolts in for the arms in and tighten them them redo the top bolts, all fitted fine then.
Paul
Hope Bridleway No 32 and Hope Woodlands Bridleway No 5 in the parish of Hope Woodlands.
Running from just north of Fullwood Stile Farm, Grid Ref SK 170 853 near Hope to a point on the A57 at Grid Ref SK 141 895.
I have recived a form to fill in, but I have never used this route. So if anyone has or wants to fill one anyway :roll: pm me am email address and I will send it on.
Paul