Well Norman, probably I am just a very lazy audiophile.
But all kidding aside, I have the following reasons for not (yet) testing the Takatsuki 300b tubes in my GG dac:
1. I really like what the Elrog 300b tubes are doing.
2. Although they have been completely reliable so far in my set up, we both know that the reliability track record of the Elrog 300b tubes in general and also in combination with the GG is not good at all. According to Lukasz the Elrog is the only 300b that ever failed on the GG. Swapping them make the chances of a break down higher. See what happened with Al's Elrog 300b tubes: they were functioning well before these tubes were being swapped and now they are 'dead'.
3. Still making serious progress with my Tidal set up. It is hard work but I am getting nearer and nearer to finalize it (although there are still three important issues that need to be resolved; see one of my earlier remarks in the Tidal La Assoluta thread). Only after the Tidal LA set up is more or less finalized/stabilized, I will be able to hear the real quality of all the different tubes.
Hopefully this makes sense.
It does.
The "rogs" are indeed delicate and its better to let sleeping dogs lie, afterall. Do you run them on the 101d setting like Mike L?