Made a brace to stiffen up the rear edge of my Westy overhead rear shelf. It was sagging after many years of use. Westfalia, bless 'em, did a good job with the cabinetry but there is a limit to the abuse that plywood can take.

Made provision for another one of the new dimmer switches in the brace. The switch controls the strip of lights under the rear edge of the shelf. I was using a dimmer switch attached to the van wall, but I think having it up on the shelf is neater. Yup, you can still reach the switch when hatch closed.

Not the most complicated mod, and some less than perfect edges ( I just went at the cut outs quickly with a roughing end mill) but it worked out.  

https://shufti.wordpress.com/2016/06/16/vanagon-rear-shelf-support/

Alistair