Unfortunatelly, I have just 2-3 EF86, of different makers, of course, and didn`t try DIY with them, they are now (almost) scarce and expensive.
But yesterday I get another 15 pcs of C3g and 4 pcs D3a (another 4 was broken ).
Nice looking projects, I`m glad when I "found" someone who actually built something Probably you know this, but besides many old tube books on-line, there is a big pentode test on Pete Millett`s DIY pages.
I like those cheap and "odd" tubes...