I have it down to 2 mowers kubota zd28 with 72" deck or a ferris 5000 with a 72" deck. kubota is a 28hp 3 cyl. diesel. ferris is a cat 31hp 3 cyl. diesel. Any one no of problems with the suspension on the ferris? Or any problems in general with the kubota or the ferris? This is to cut my personal lawn about 7 acres. thanks for any help.