I have the Cannon 10's also. I blew my top in a rant the other day because of how poorly
some of this stuff is made. (I'll keep my cool for now). I am using the low profile swivel mounts,
which are insanely expensive for what they are, and after docking my boat saw that the rigger
was out of position. That makes the second time I've had the lock pin shear off.
That being said, I've taken the thing apart and replaced the pin before (super cheap, fix yourself) and
found that there is still going to be some slop in the swivel. That slop is what allows the force to
shear the pin. I now drive at speed with the booms fully retracted no matter how short a distance.
Maybe you're supposed to do that anyway... oops.
As for the boom itself being sloppy, I haven't had that issue. I would unscrew it and check to see
if there is anything preventing it from fully compressing the pipe. Otherwise, chalk it up to manufacturing.
Worst case, wrap it. It only needs to fit once.
I am waiting a week now for another pin, so sorry if I still sound a little bitter.
With the slop, it seems to be common with these riggers.