Owner has managed to get away with dragons teeth retaining clips digging into the glass envelope of his replacement type with no bakelite base . How to fabricate something approximating those woven glass mesh baskets that go over the envelope and then a pair of springs down to the chassis or any other ideas other than replacing with based envelope types ?
Incidently the first thing I did was undo the screws of the dragons teeth in hope of relieving some of the teeth force before removing the valves , but was that the correct approach?