Deeply, deeply confused (BB issue)

So I got this sweet deal on a nice old Raleigh, the Super Course with the Nervex lugs, and blah blah blah insert impressive pedigree here. Anyway, I am having just one hell of a time finding a BB spindle that will work. Wait, back up: I am also having one hell of a time getting the fixed cup seated all the way-- it's still about 3mm out from the BB shell. Lots of solvent to clean the threads, even used a dental pick to clear out any googe in the thread valleys, and a thin layer of Phil grease to smoove things out-- all have had no effect on this. The threads are clean, no burrs or mangled threads... Is this normal? I've never really putzed around with fixed cups before. Do I just need to throw caution to the wind and let my biceps channel Chuck Norris for this?

Now, even accounting for this, my other issue is that all the spindles I am finding have their cone sections too close together; I need to screw the left-hand cup WAY into the BB shell. I mean, it is actually recessed into the shell before the bearings seat; obviously, this makes getting the lockring on somewhat problematic.

Now, Sheldon Brown says that the Super Course used British Standard threading in the BB, and given that I can run the cup so far in, I've got to believe that at least the threads are in agreement and that's kosher. But what's up with the spindle? Do I need a different spindle that has more distance between the cones? Or is there some oddball Nottinghamshire cup that accounts for this and moves the bearings toward the races?

What gives? Am I gonna shoot my eye out or something?

Get someone to add some extra thread to the BB shell, or risk it by forcing it by hand (cutting as you turn).

Hot damn, I fixed it already. Went to my friend's machinist shop and borrowed a tap and cut an extra two threads. As the tap went in I felt it clear out a couple burrs I'd clearly missed.

Also, I was trying to make a 68mm spindle fit in a 73mm shell, and that just won't work; no, not if it was ever so. It's all better now; thanks!