Last Minute Overhang

My original plan had the entire roof system (plywood-rigid insulation-OSB) overhanging the front door.  The rigid sandwiched between the two sheets would have created a strong structural element that could overhang 30" without support.

But, a while ago I changed my design, which I'm now realizing effects this overhang.  Basically, I wanted to create a continuous vapour barrier from the tar paper on the roof (the first layer of sheathing, under the rigid) to the tyvek on the walls.  I also wanted the rigid on the roof to meet the rigid on the wall with no wood in-between.  Doing this left only the top layer of the roof system (5/8" OSB) as my overhang.  Obviously this is no longer self-supporting up to 30" like the original plan was.   I need to spend tonight coming up with a solution!

It's getting dark earlier, so instead of hanging out in the cold and dark at the build site, I went into town and had a nice meal, where I could think things through in comfort.

My plan now is to build triangular supports above the front door to support the overhang.  My decision to build the supports outboard of the rigid is somewhat controversial, but I am going to give it a try.  I am trusting that the rigid insulation will not compress under the weight of the overhang.  Time will tell!