All the readin I've done, it seems they work best with the monoleafs. I don't think the XHD springs would allow them to "work" as much as with the mono leafs. With a lower torque application, I don't think that would benefit me much.
Well I wish I had the experience to tell you a for sure about that, I do know people use them on multi leaf set ups but yeah I just don't know. I think rat Bastid is running a multi leaf if I remember correctly.