I suspect it wouldn't be too tough to implement these as driver tubes in the 300B Paramount, the first stage tube in the Crack, or any number of different positions in the Foreplay III/Extended Foreplay III (probably better in a non-extended FP-III with active loads).
They are a pretty terrible choice in the Seduction, as the power transformer doesn't have sufficient B+ current to properly operate this tube. The Eros design is also tight enough that this probably isn't a super choice.
