I'm putting a Seahorse 540 case onto a 2012 KLR 650 stock rear cargo rack. The plan it to plan out 4 holes and drill so I can still access the tool kit. I will put silicone sealant around the hole as I tighten it up so I can better water proof it. I'm putting panniers on and probably won't haul much weight in this, 10-15 pounds at most I figure, but mostly clothes or rain gear or my lunch pail for work. Here is a diagram of my idea for mounting it. I was thinking that using a rubber bushing between would help isolate the box from the bikes vibration and shocks offroad, although it will be on road 80-90% of the time I do like to play in the dirt. Does anyone have any suggestions or input on how to mount the box? What kind of hardware I should use? I'd like to do it well, but not make it overly complicated. I'm planning on putting it on semi-permanently, maybe use wing nuts instead of hex heads on the end of the fastener inside the box. I'm also planning on putting some footman loops on top of the box.