Glad the tool enabled you to do the job Andy.
I am just curious as to why it is necessary to use alternative nuts that are smooth on the mating face rather than using the original serrated nuts.
Surely loctite applied to the threads of the original nuts would have had the same effect, (if not better), because you would then have the anti vibration effect of the serrations plus the locking effect of the loctite.
Just a thought!