[Arran]

The tubes should all be 300 ma, at least the 43s are, but with 25 volt filaments. In fact if any of the tubes were more then 300 ma they could not operate them in series, this isn't a matter of opinion, it's a fact, no equalizing resistors used nor needed, just a line dropper. I think that you just made more work for yourself by separating the pair of 43s from the rest of the tubes, no need to re-invent the wheel here. The only difference between this set and a typical AA5, in term of series string, is that it has 8 tubes rather then 5, and six of the tubes have 6.3 volt filaments and two have 25 volt filaments, and the string has a 300 ma current draw rather then 150 ma.
Regards
Arran