What is the size difference between the grapple bucket and the light material bucket? I can't find anything in the PT literature that gives this information. Would it be feasible and/or practical to fabricate grapple arms for the LMB (maybe even with an easy on - easy off type feature) that would allow it to do double duty? I'm guessing there must be some issues with doing this since they make both buckets, but I can't really see what they'd be.