I think the mod that the Vario side cases really need are an additional brace for stability. These cases essentially attach at the top and side and allow too much "wobble". I've thought about attaching a brace between the two cases at the bottom rear corners to reduce the sag and take the wobble out. There is a big difference between the way the bags hang on the bike empty and then loaded/extended. I've not ridden with the Varios off road, but I think the plastic side attachment point would eventaully fatigue and fail.