I bought an older 6 foot Pak-Flail flail mower to go with my new L4701 that I bring home on Thursday. The PTO shaft was not included with the mower. I am new to this tractor thing and am not sure if these pto shafts are fairly universal or is the specific connections for Kubota's and brands of attachments? If I decide to add a quick hitch do I need a longer pto shaft to account for the extra space between the tractor and the mower? Sorry for the rookie question.