I did a search for this, but something must be wrong with the search function, because I'm not getting relevant answers.
So I stuck my heavy repeater into a Stone of Change along with a pile of Khyber Dragonshard fragments, making sure the crossbow was unlocked and not equipped. I pushed the cruncher button, and....Nothing happened. The cruncher crunched, then failed to attune/bind the weapon to me.
Am I not allowed to attune/bind a repeating heavy crossbow for some reason? I don't think I've ever attuned a ranged weapon before, is it disallowed?