MT-

I guess my map case may be more flexible than your.  When I tried the bungee approach, the weight of the case pulled it in from both sides until it was beginning to fold in the middle.  The dealee-bobs have enough "bite" to solve that problem for me.  I even played around with one of those retractable key-chain things a bit, but decided against that solution ... maybe "overthinking" the problem.

My post was more aimed at a solution for GPS/Depth finder rigging.  On traveling days, I'll just tilt the depth finder screen back so the bottom half of the map case rests on top of it at ~ 45 degree angle.  I've had no issues with being able to see the map, unless the case gets a little rain on it ... then I'll sometimes have to wipe it off to see it more clearly.  (Anyone tried any Rain-X on their map case?)

Besides, I print my own maps for my trips so I can produce them in "Big Chief" size.  I also tend to tweak up the contrast colors between land and water a bit so shore line is a bit easier to distinguish.   ;D

dd