I've now had my 'replacement' Elrog 300b's running on the 2a3/101d setting on the SE GG for 4 months, listening 2-5 hours daily.....without one issue. my first set did 'go weak' with the 300b setting after about 150 hours.
and I think they are better than any other tube I've heard as far as the combination of space, mid range magic, nuance and agility. there is no slowing down the snap or bass articulation compared to the Psvane 300b.....which does get a bit 'thick' compared to the 101d or 45.
I also own the Psvane 101d WE Replicas, the Psvane 300b WE Replicas, and the NU 45's. the 'melt into' mid range of the Elrog is really nice. the word visitors have used is 'glorious'.
my preferred recti is the Takatsuki 274b.
Cool - that is great Mike. 2-5 hrs listening a day is awesome and I am very jealous. Your visitors use of the word "glorious" makes me smile because it really does sound that way with 300b's. I ought to try the Elrog - I am using Kron 300b balloons that have an addictive midrange that no other tube type surpasses IMHO.