battue I will gladly weigh in with my opinion on your offhand form, looks about spot on to me. Head down in a comfortable position stable position, eye relief to scope looks skookum, support arm well under forearm and same elbow tucked in for nice stable platform, slightly leaning forward to absorb recoil.

Seems thats about the form I use to shoot offhand as that is how i was taught by people who shoot professionally as in shooting to live!