I have an unused 72" JD mid-mower deck + brackets + prop shaft, etc. that I used 2 seasons on my 1070. Requires a 2200 rpm mid-pto. It's in really good shape. Has been stored inside for 10 years without any use. The MMM concept just doesn't work for me because I bale hay with the tractor, too. I have to remove it to clear windrows.
Was going to convert it to a front mower on the loader arms but then bought an F-935 with a 72" deck. PM me for details. Come take a look. I'm in Brighton MI.