Locking nut repair for stripped axle threads

I've read many posts on the topic of the repair nut thats available for an 8n but could not find the actual procedure explained. So I am wondering if this is correct:

So I assume the idea is to put the repair nut onto the axle, hold it w/ a wrench, and then thread the outside locking nut onto it, tightening it to 450 ft-lbs. The problem is that I cant hold the inner nut on with my pipe wrench and tighten the outer nut simultaneously due to the width of the tool itself.

I am planning on making a wrench to fit the inner nut out of a piece of 1/4" steel. Is this the iprocedure. Any help is appreciated.

This board is an invaluable resource to rookies like me.

I couldn't get the outer nut on as it appeared that it had expanded, so I backed the inner nut it off until it would go on. Actually had to bend the outer split portion of the nut down a bit. Then I turned the outer nut a ways, until it started turning the inner nut, then I turned them together until the wheel had no slop in it - It was about at the same point when the wheel had been snug the first time. Then I tightened the outer by itself I guess I put about 200 ft-lbs on it, before I started getting low on threads. I could not turn them both together as I dont have a socket that big - I'll probaly go and get one of those cheap imported 3/4" drive sets now. I figure it will be ok, at least until I get my new sockets. I'll try it out this weekend and post if it worked.

I guess I didn't have the 2nd nut on tight enough when I started tightening both. It's still pretty tight, I see how long it lasts. I guess welding the nut on the axle is my last resort before replacing the axle.