On Wednesday, November 25, 2015 at 4:33:12 PM UTC-6, BillyBobMarley wrote:

I dread having to dig inside my 520 if things ever go haywire but with the guidance of the group and some elmerly encouragement ya never know I might just get 'er done

They are pretty easy to work on. I used to rebuild basket case 520's for me
and others. Pretty straight forward, and you don't really need too much test
gear to work on one. It's been a while, but if I remember right, I can do
almost everything in the alignment with just a good meter, and a freq
counter, along with the calibrator in the rig.