Single gain stage Pre3?

[MrKettle]

I have just got a Pre3 back up and running in my second system. The power amps are the KMTech gainclone boards from ebay set for gain of x22 so as you would expect even on the lower x6 wiring for the outlut transformers the gain is far too much.

Which got me thinking. From my back of a packet workings it looks to me like you could wire up a single ECC82 as per the second stage of the normal Pre3 circuit and give about unity gain. Is this something that anyone has tried, with this or another valve (given the space constraints it would probably need to be a noval base)?

I am aware of the CF mod, but like the concept of transformer coupling so would prefer to keep it that way, if only to allow balanced output if required in the future.