[Arran]

You may want to verify that the Bakelite block condensers were in fact restuffed, Lew Magrish is well known for getting his repair guys to do the bare minimum to get a set playing for resale, then charging prices like they actually were fully restored. It is possible that the reason the set cuts out has to do with the grid cap leads, those like to break internally, especially near the clip. The solder joints on one or more grid caps could also be failing, fresh solder may fix them.