I just scored (2) waterproof swiss rucksacks on ebay for about $35 a piece. These things are outstanding! I'm going to connect the shoulder straps together under the seat. Good thing is, there are additional straps the buckle to the frame. Only thing I have to work out is keeping the right bag from melting on the exhaust. I wouldn't say they'd hold up to a low slide, but they'll hold their own if/when that happens. Any ideas on how to "melt proof" the backsides?