[Arran]

Which capacitors have the epoxy in them, they look like paper and wax to me? What I do with those is melt the wax out in an old toaster oven, at about 200 degrees, then the old caps just slip right out of the tube. I've surprised that this set has rubber wire, it looks post war to me, then again they were using whatever they could get at the time thanks to materials shortages. Get rid of those sand resistors, they are garbage, the ends of the resistive wire corrode and they go open circuit.
 Speaking of drilling an old cap out, that's one way to re-stuff a bumblebee or Sangamo Little Chief cap, cut one end off, drill out the contents with a bit of the right size, then remove the leads from the ends with a smaller bit.
Regards
Arran