I love the 72" mid-mower.
Scalping: Through the years I accumulated a 60" and a 72" rear mower that I used on my
B2150 prior to purchasing the
B2910. I have had no scalping problems with either of the 3 mowers. I can't remember the cutting height that I have them set to, but I think that they are set somewhere between 2.5" and 3" (I think 3" is the setting). Lower settings may cause more scalping problems.
R&R: To remove the 72" mower you disconnect the drive shaft and 3 pins, chock the mower deck to prevent movement, then drive over it. Pretty easy. I have recently added a Kubota FEL to the
B2910 and have not removed the deck since the FEL was added.
60" versus 72" deck: I have seen a few 60" and 72" decks for sale on Ebay fairly cheap and thought about getting another deck as a spare (they were selling in the $150-$600 range; some supposedly complete with all mounting hardware, some were deck only; some were nearly new and new "old stock" at various dealers such as Carver's in NC). After looking at the specs on the 60" deck I decided that I liked the 72" much better. I can't remember all the specifics, but I do remember that I liked the wheel arrangement on the 72" better; however, if I remember correctly the 60" wheel arrangement allowed the deck to be removed without driving over it.
Rear vs Mid Mower: I know that you didn't ask about this, but there are a lot of discussions on rear-vs-mid mowers. When I need to mow and have one tractor with the 72" mid mower sitting beside the other tractor with the 72" rear mower, I strongly prefer mowing with the mid-mower. Granted, if I had to frequently remove the mower for other tasks, and only had one tractor, I'd probably prefer the rear mower.
Kelvin