I'm glad the tool worked for you.
As I mentioned to you when you came over last weekend, those threads
on the front cones tend to corrode and collect debris. I'll see if I
can find the necessary parts to make a long extension for a 1/2-20
tap. I know you said the other side looks to be OK. However, the
nylon cup in the front arms tends to go dry over time. Once the
grease is gone it's only a matter of time before the steel ball wears
through. This would be a good time to re-lube the other side if you
can get the puller rod in there.
Doug L.