Elrog 300B vs Takatsuki 300B tubes

Finally, got my replacement pair yesterday (Thanks, Matthias) and spending my Friday evening listening to them right now. I am not sure what has been changed in this replacement pair but I think they sound even better than the original version. I just hope they don't fail prematurely like previous version. Only the time will tell. These are amazing tubes and I think they worth of all that trouble I went through. Best wish for those who are still waiting for the replacement pair but I think you won't be disappointed.

Some post back, there was suggestion of modding the Frankenstein monos by adding about 200ohm of resistance somewhere. Instead of modding the amp, is it possible to simply make a tube converter/adapter that wire a resistor to the pin of anode (or pins of filament)? Will that take care of the issue (without modding the amp)? Thanks.

Wyan001:
Unfortunately you can't make adapter to add R to cathode bias: heater pins should be connected directly to 5v heater supply and virtual center of the heater goes via bias resistor to the ground (that's where additional R supposed to go). Also cathode resistor (in this case exiting one in series with the 200 ohm) is bypassed by capacitor.

I also got my replacement pair (Matthias, thank you very much) and they sounds like ... Elrogs!

Alexzzz, thanks. :)