So in the end and after spending about 20 bucks for drills and about 2
hours trying to drill it out, I got serious. I took another trip to
the depot and picked up a cutting wheel set for my Dremel, a
Bernzamatic pencil torch and fuel. I had the three remaining hex nuts
coaxed off in less than 5 minutes with a little heat, The snockered up
hexnut was out in another 2 minutes.

So if you're going to have to take out some of those hardened buggers
I would apply a little heat if they give yu any resistance. Torch was
$9.99 and as far as I am concerned a very good investment. Dremel
cutting wheel set was another $13 and likewise a good investment.

regards,
NEO