No problemo, here's a refresher: the 6J5 adapter is essentially to convert one dual triode tube (mainly 6SN7) into two single triode tubes; hence two 6J5 are compatible with it but not 6SN7 which is dual triode. On the 6BL7 to 6AS7 adapter under it which houses the dual 6J5 adapter one on socket, either a single 6BL7 or a 6SN7 is compatible on its' other slot. I have tried a 6SN7 + dual 6J5's originally and something sounded thin / off kilter IIRC. However this brings me to my next best setup which is 6BL7 + 6SN7 as powers, and 6SN7 drivers (dual powers and single drivers), which was covered a while back. This setup is snappy, focused and tightly articulated making it more suitable for electronic music and the likes of synth-heavy pop.