Thanks John. As you already know I also have a new set of those same VCL4500 tubes.
I spent almost two years working intensely together with Louise at LCD to get all of those discontinued Aristo replacement lamp grids back into production, just so I could buy a set for myself. (At the undiscounted full price, I might add.)
Now they are available for anyone who wants to keep their expensive Aristo standard and VC heads working like new. Or wants to by a used unit knowing they can likely refurbish it to like-new light output condition.
I'm stupid? I have no foresight? I need to find a way to adapt? Deck chairs on the Titanic?