Have an 08 so I'm not entirely up to speed on 07's. This I do know: Rotary air screen seals last around a year get old an hard and need to be replaced. Check mounting on hydraulic lines which on some vibrated and cracked.
Ran a 40' honeybee draper on an 08 last year in 40-50 bu spring wheat and 70-80 bu barley and the only thing that slowed it down was green barley straw late a couple of evenings. 20' header, Ha! Ha! Now that's humorous.