Buying Advice 72" Hyd. Deck ?'s

[thehemikid]

...How hard/easy is it to attach/detach a 72" Hyd. lift deck, & How easy/hard is it to put the Hyd system for this on a 721D.

 

[thehemikid]

...This pic tells me most of what I wanted to know. I see the attach/detaching of the deck is no different.

...So, my next ? is when was the change over to the newer style hyd system through the front of the frame? I'll dig around, maybe I'll find that too.