By design, the three bigger Spreader Plates are a whisker over-size for the pole – this caters for changes in tolerance of each pole batch.
To achieve a perfect fit, wrap 1.5 to 2 wraps of electrical tape around the join where the plate fits. Apply the plate, then push down firmly and tighen the EzClamp on the top.
Added benefit is that moisture will have a hard time getting in this crack.
See pictures:
Add the tape (above)
Slip over the plate
Push and twist the plate hard down and secure the EzClamp
End result