Hi Brendan
you did the job - congratulations!
One additional comment to the discussion about tightening and loosening only with a lead hammer.
For guys which do this all the time and very often, the lead hammer is for sure the easiest method. But not all of us do that work so often that they have the needed routine.
That was the reason for me to build my own tool.
I think not only loosening could be a big issue but also tightening. If you tighten the knock-offs too much you will also have big problems to loosen them again.
That's why I mad a tool to torque the spinners exactly ... and to loosen them later again.
Here are some photos to it ( I already posted them this march ):
new home-made tool works perfect - Club Cobra Photo Gallery
new tool fits perfect onto the knock-offs - Club Cobra Photo Gallery
Head for my new home-made knock-off tool - Club Cobra Photo Gallery
The big advantage of my tool is, that all three spinner arms are used. The risk to overload and damage one single arm is really small.
In the meantime I realized, that another guy in the US is selling a similar tool to mine:
PhotoPost Classifieds - Knock off spinner socket - Powered by PhotoPost Classifieds
Possible this tool could also be interesting for you to torque the spinners correctly in the future.
(I torque them with 300Nm with good experience)
(I hope you understand what I would say, despite my bad English)
Cheers
Werner
(Bavaria/Germany)