Yeah, thanks :-) I made my own luggage rack on a rear seat base to hold two backpacks on the sides and a duffel on top. That way I have a waterproof system (30l backpacks and 60l duffel from Overboard) that I can move to my bicycle, and carry with me if I do day hikes (or more) away from the bike. And fit all my fishing gear All at a fraction of the cost of e.g. ortlieb, and with a whole lot more versatility.
I posted about the rack in the "make your own farkle" thread on advrider.