Backed, though only for one set (for now - might up that if it gets close). I assume they fit in with the Foundry Gensdarmes, as the foot knights?
If so, Eureka will likely be too small, and the Lead Adventure a tad too large to field them in a unit.
Is the armour the same as for the foot knights? Some detail looks so, but I am not sure, especially as the heads are interchangable.