What is a safe, dry, and secure way of carrying a 17" widescreen laptop on a motorbike? I hate backpacks because of the restriction to movement, so that is a last resort. The dimensions of the laptop are: 400mmx290mmx50mm It would also need padding as well. My bike is a VTR1000F. I've thought about top boxes, modifying bags or making my own. I would like any ugly attachments eaisly removable like the ventura rack system. Any suggestions?