I have a 2006 BMW F650GS currently setup with a 35 liter pelican brand case modified by Caribou Cases for my top box. Saw the Rotopax 2 gal "storage" type case and would like opinions on mounting that sucker to the top of my Pelican case. The Pelican is extremely durable and the wall thickness I think is fine for it. Wondering if anyone has done this? Specifically for the storage type rotopax case wondering if the locking handle would prevent anyone from opening the case while it is mounted to the top of my Pelican. Basically looking for a secure way to carry some tools and such.