mtmower call me crazy but in the side view pictures of your mower it "looks" like the deck is pitched back instead of forward. It might just be the pics or the fact the front of the deck skirt is raised compared to the back?
2013 Gravely 460Z 29EFI
2011 Gravely 36GR
2008 Gravely 160Z
2004 Gravely 34Z
1998 Lazer Z HP 48 (old faithful)