Over 20 degrees???....sook!
Ok..OK....I'll be helpful if ya gonna be like that.
Actually...would you believe your problem is one of the reasons I choose an RMC. The doors hinge from a very solid frame behind the dash and the striker plate fixings go thru the glass and thru a piece of angle bolted to the chassis inside the wheeel arch. I swear one could jack the car from under the doors.
Having said that....The RMC has a lot not going for it too....Like I could breed fish in the hollows in the body moulding.