Tank with bungees and some stuff strapped down. Note the valve on the tank- it's at the bottom corner of the tank.
1/4 turn gas cap, rectangular overflow tank, plus vent hose are on the higher side. The vent hose runs under the package shelf, down the non-exhaust side of the DL650.
The Maxia E52 looks very nice on the back.
The E52 is large enough for the case to open fully.
I'm happy to have my new tank. I know, I look like a squid here. The tank is a ways back, but it could work as a backrest (especially with a small gel pad).
Here is the tank with an E36 case. It doesn't open all the way, but the plastic tabs could be ground off to allow it to open further.
You can see the clips on the bottom of the tank. The bolts are very large, making the connection to the brackets very strong.
Blurry picture, but you can see the bungee tabs here. They are on the front of each side, plus on the rear of the tank. None on the front, because I don't really want to hit them if I rapidly depart the motorcycle.