pashworth, most definitely YES! Like I said, the results those gatorblades had on my B23's 60" MMM is amazing!
Everything is better over the std blades, better lift, less discharge and a MUCH better finish!
I only had about 5 mowings on them but they seem to hold an edge very well too.
I highly recommend them but unfortunatly they need to have bushings/spacers made inorder to bolt up to the BX's MMM's. The bushings are easy to make out of a std cat 1 to cat2 bushing adapter. Just cut it down into 3 pieces (1 for each blade/spindle) and your in business. I don't think the bushings/spacers are needed for Kubota ZTR's but I'm not sure.
Volfandt