Removong the idler arm lock nut? 13 HD

[DanM]

I've been cleaning and inspecting the 13 single and am very happy with it. All the serial numbers match! I got the pully off, but am having touble with the idler arm lock nut (AA-154). I removed the locking screw, but cannot budge the it. The two slots for a spanner are shot, so I tried tapping in them with a punch. Is there anything else holding the nut except the threads? Is it left or right handed? I used gentle heat and have it soaking in Kroil. anything I am overlooking?
THANKS!

[DanM]

Well, I got it off. I guess it was just stuck with age and oil, etc. Right handed.