Elrog 300B vs Takatsuki 300B tubes

Hi All,
Read through all 13 pages with interest and fascination and thanks to all who shared their insights. I have the Franks and CSL that I recently switched up to PSVANE WE replicas. Been running them for two month with about 200 hours on them. They have been spectacular IMHO. A friend told me about the Elrogs and looked them up and was led me to this thread. My question would be did Thomas Mayers recent acquisition of the Elrog works fix the 300B issues. According to his blog he is selling out all current production tubes and have no quality issues except for shipping damage. 2nd, I am wondering with charles1dad, with the all the heartbreaking issues he has had with the Elrogs in his Franks if tried putting back the original spec rectifier tubes. The Franks use 5U4GB and Isreal says they are different than even 5U4G. I believe he said 5U4GB takes more current. Charles mentions he is using nos Mullard GZ37, how compatible/reliable are they? Have other Frank users had similar unfortunate experience as charles with the latest batch of Elrog 300B?

Regards
  

In the Coincident manual for the Franks, it specifically says uses 5u4gb and don't use 5u4g. Before reading the manual I did roll some 5u4g tubes in because they looked cooler with their bottle shape. One amp stopped functioning shortly after but luckily it was just a blown fuse. When I inquired with Isreal he referred me to manual and said use 5u4gb only. Was blown fuse the result of the 5u4g?Cant say for sure. Interestingly on EML spec on note 4 it says they are not the same:
http://www.emissionlabs.com/datasheets/EML5U4G.htm
I guess it is a case of it works until it doesn't.

Very much loving the Coincident Franks and CSL. Actually got the Statement Phono first and loved that, then decided to go all in. Big improvement on CSL and Franks w PSVANE WE replicas. Will be ordering the Elrogs next week to see how much better it can get.