Hi John,
Yes these tubes are designed around modern amp designs and are not a direct replacement for the RCA amp designs. It is supposed to be a simple amp mod to use the TJ's. Rachel is actually working on this and documentation has been translated into English and should be up on the TJ site soon.
We are working closely with both Shuguang and TJ to get the 'hard to get' tubes out on the market with different flavours. The Shuguang 211, 805's and 845's are out of stock at the factory for the highest quality and premium matched pairs, we will get some as they are made again to the spec we expect.
Cheers,
Ian