Thanks for review.
Thor website shows 25.3 having a jack-knife sofa, not a dinette. Was yours a custom order? I asked about a dinette in place of sofa a while back and was told they wouldn't make any changes to Axis/Vegas floorplans. It'd be nice if they changed that policy.
By the way, your motorhome is on an E-450 chassis, not F-450. The E-Series comes from Econoline vans, whereas F-450 would be heavy-duty pickup-truck-based chassis.