Psvane 300-B Tubes ? ? ?


Does anyone out there have any experience with Psvane 300-B MKII or their WE300-B Replica tubes ?  

I found the best sound from initially the Sophia Princess mesh-plate 300-B's, then their Royal Princess 300-B's however I'm definitely NOT happy with their reliability, especially the Royal Princess !  
I had a mesh-plate from new have a glowing spot on the mesh-plate, and they told me it was from sitting on the shelf for over a year !  REALLY ! ? ! ?  And I had two Royal Princess tubes go out with less than 600-hours on them, unfortunately well-past 1-yr. warranty.  Left a bad taste...  I'm NOT going back...  
I've tried EH gold-grid 300-B's, Gold-Lion's, JJ's...  All sound somewhat different but the Sophias sounded the best, however in my experience, reliability is questionable...  Thanks...  John  
liquidsound
Thanks Jond,
Frequent attendance in live jazz clubs over the years (and a piano in our home) has conditioned the ears to natural sound. At least this is what I’ve come to believe. 😊
Charles
Nice speaking of which caught The Gil Evans Project doing the 60th anniversary of Miles Ahead at the Jazz Standard in NYC over Memorial Day weekend a really great show. My first live jazz in sometime I'm embarrassed to say.
@liquidsound heard the Emission-Labs 300-B (not the XLS variant) and they sound good however not as good (in my opinion) as my Sophia Princess mesh-plates tubes. 

Sorry I'm not clear, are you referring to to the Emission-Labs 300b solid plates in your comparison and is it the pricier Royal Princess or the similar priced Sophia princess mesh you compared against eachother. I ask because I use the solid plates but I've been curious about the punched metal "mesh" of  Sophia mid priced 300b. Thanks
I'm still using the Sophia mesh-plates.  I gave up on the Royal Princess a good while ago.  I am looking for a good replacement for the Princess mesh-plates.  I have heard the Emission-Labs solid plates, not the mesh.  The sound is good but notably different than the Sophia mesh plates.  If I can find a 300-B tube that sounds like the Sophia mesh-plates or the Royal Princess, that would be great.  No more Sophia tubes for me !