nice result on the frame/hub info Greg
top hat washer should be a snug fit on the spindle, if not get a new one or shim it with a bit of coke can .
Tight Spot i use this method if you can follow it? , can usually get rid of the tight spot altogether
tighten up the wheel, slacken off the crank arm bolt holding the chain ring on just enough to allow it to move with a bit of force then spin the cranks until the chain goes tight then press the chain inwards towards the chain stay with your hand this will move the chain ring a bit and should even out the tight spot, might kneed to do it in a few places, tighten up the bolt, will only work if the top hat is a snug fit to begin with , you may also have slip of the chain and move the cranks round a bit then try it again, its because the hubs and the cranks/chain ring are machined on different machines so the centers are slightly different , usually with a sealed hub and sealed BB the tight spot will only be small/short so its usually the chain ring thats out a bit