[Beardyman]

Originality is sometimes important but in this case not. I refuse to pay £60+ for a valve that has an unknown history & doubtful construction. From what I've read the 6P25 has a better reputation & is significantly cheaper (approx. £18). If this set was a high end model I may have been tempted to "splash the cash". Yes, output transformers are easily damaged & I'll be keeping a weather eye on that when the new valve arrives. All the changes will be documented so if in the future the next owner wishes to put it back to original then they can. BTW, the case is looking much much better! Have a good day.