But just for fun if you wanted to spend$400, then the assassin bars will work for ya, I think caltracs are cheaper for standard spring location. I bought these for the good reasons stated & they're a bit cheaper than the inboard spring caltracs. Maybe $20 bucks or so, but I'm sure I'll be happy with them.
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.