Paul, Just make sure that the dimensions of the Super jumbo bags will fit between your shocks and rear indicators.
You must reinforce the inboard side (the side the brackets fasten to) of the saddleman bags. I used both plexiglass (Vera Lynn) and 1/4" plywood (Cinnamon Girl).
I have the jumbo Saddleman bags btw.
The Willie and Max bags albeit good bags are more flimsy than the saddleman bags. needless to say these need the inboard reinforcements too.
tip: When you re-install the fender rail bolts you might need to grab the fender and jostle it so the bolt holes line up.
