Thanks for the responses guys. Yes, I am looking for quick disconnect and am looking specifically at the mobile versions which would make them very practical for work.
My concern was if they could be bolted up to motorcycle rack. If they can, I'll try to make it work. My fab skills are limited due to the limited tools I have so I can't go as extreme as Ken.
Ken, I'm not too concerned about weight because I'll be carrying just the laptop and job sensitive paperwork, of which both needs to remain water proof. Side cases will come later because the Alu-Rack is already on its way. No idea when I'll be able to afford side cases as that gets expensive in a hurry.
So, any ideas on if/how a mobile case could mount up? I can't seem to find pictures of the back side of the 1560/1560m or similar cases to compare.