I am considering buying one. Sat on a Raven and have been looking at them for quite awhile. The website states to not use the topcase with the side bags at the same time. Why is this? I see pics of these all installed on many bikes. I understand loading and performance, I know what can happen. Has anyone had serious issues with the OEM set-ups all installed at the same time? (topcase and side bags) . These OEM parts and adapter kits are a little spendy but so are other manufacturers that I have seen, dollar for dollar is it worth it? I am not a heavy user and will not be touring or carrying a great deal. I will be carrying just essentials and extra gear, usually nothing very heavy. Do they leak? They look very durable in the pictures. Any tips is appreciated. Thanks folks.