When I looked at other RVs, I decided I didn't like to see the hinges showing on the baggage door and the oil door. So, I designed a way to hide them.

Here is the finished baggage door. There is just a clean joint where the hinge would be. I am hoping that it will be more waterproof than the hinge would be, but haven't tried that yet.
     
I am hoping to get a better picture of the hinge brackets. The stock brace from firewall to baggage bulkhead is used, and for hinges, tie rod ends. This allows the gap to be adjusted. Update 9/23/03  After 120 hours, and several hard rains, it has not leaked a drop.
     
I used a gas spring (20 lb.) to hold the door open. I was able to work out the geometry so that the spring also holds the door closed when it is down.          

To build one for yourself...the only critical dimensions are those called out from the pivot hole. The rest are arbitrary. There is some fitting involved depending on exactly where the rod end pivot ends up. The 4 inch dimension doesn't matter, it just determines the final angle the bracket ends up at. You will need to trim at the dotted line to make sure it doesn't push the skin up. You need to rivet the bracket onto the side rails of the baggage door before you put the bottom skin on, using flush rivets. You may need to trim the side pieces to clear. I used .062" 6061 for these pieces.

The flat piece adds some rigidity to the braces, it can be any size you want. I used .040 4" wide with 1/2" flanges.

Still no leaks after 3 times at Oshkosh and torrential rains.
     
Here is the oil door closed. There are hinges on each side, one is just a pin that is pulled to open. The pin is accessed from the baggage compartment. The baggage door holds the pin in when closed.
     
Using the same principle as the baggage door to offset the hinge. This time I used piano hinge, and a piece of channel, and a piece of angle. Having the hinge on the bottom side allows the weight of the door to hold it open.
 
Inside view of the oil door hinge.
Here are both doors open.
Painted even!

Cowl hinge works well if offset like this...it allows sanding of the edges for final fit, and provides a background so light doesn't show between the halves.