I bought my
L3240 in 2007. I spent a lot of time turning my hay field into a nice lawn. I am set up with the 724 loader and MMM on loaded R4's. I told the dealer that I wanted the tires with the MMM and they said no problem. After reading the manual, I discovered the deck and tires are not compatible according to Kubota. I addressed this with the dealer and he said that he had done this for a couple of other guys and they were happy. I have found that with the mower raised to it's fullest, the right rear anti-scalp wheel sometimes rubs on the rear tire. I dealt with that by just lowering it a very little bit when I transported the mower deck and it was never a real problem.
I would recommend the setup and will say it is the best mower I have ever used, it leaves my lawn looking awesome.
The only thing that adds to my mowing days is I take the mower deck on and off every time I mow. I find that I use the tractor a lot in between mowing, and I do not want to beat up my mower deck. Also, I remove the loader every time I mow. My experience was with the mower and loader on, not only was I more likely to knock down a wall of the house but the extra weight on the front end did damage to my turf on turns. I think it adds about 20 extra minutes to my routine but I am still very happy. If I didn't do much loader work in between I would just leave it off for the mowing season.