If the Calypso's sound was mushy because it was plugged into a power conditioner (PLC), it is time to 86 that PLC. I have a friend that has several years experience with the Calypso, various tube-rolling efforts and power cords and power conditioners. He used the original Hydra PLC. When it was removed from the system, the clarity and dimensionality took a major nose dive. He has since moved onto the Running Springs Haley PLC which takes the system to a new level of dynamic contrasts. So your observation has nothing to do with the Calypso but rather the PLC you used.
As for tube rolling, it takes many years of trial and error with many tube types, brands, etc., in lots of various components, to get a feel for the contributions made by one tube or another. To simply swap out the stock tubes with a random set and think that is it ..... well, you've only just begun.
As for having to put back the EH 6922, if this is required, something is seriously wrong with your system. This tube has so many problems, I don't even know where to start!
As for tube rolling, it takes many years of trial and error with many tube types, brands, etc., in lots of various components, to get a feel for the contributions made by one tube or another. To simply swap out the stock tubes with a random set and think that is it ..... well, you've only just begun.
As for having to put back the EH 6922, if this is required, something is seriously wrong with your system. This tube has so many problems, I don't even know where to start!