When you say to drill holes in the pannier case first: “(Drill the holes in the Pannier case first. Then place the aluminum plate behind the case through the space above the latch mechanism. Line up the plate to the holes and mark the holes.)”
Are you referring to the black luggage case section that the lids cover?
And, do you remove the black luggage case section for this process? I wasn’t sure if you were referring to the lids?
Are you using two or four rivets on the latches? I am thinking that I could use the latch and the catch as a template to mark the hole positions onto the backing plates, then drill the holes in the backing plates and use them as templates to mark the hole locations onto the pannier covers and onto the black luggage case sections. What do you think? I was having a difficult time seeing how you could place the backing plate under the black luggage case sections. With the seat removed it’s still very awkward if not nearly impossible to do this. I read someone’s comment that they used beads tied onto string for this, but didn’t locate the explanation of this in your thread. One other thing I was wondering, it’s not perfectly level where the pannier covers meet the black luggage case section. Thanks again for your advice. I apologize it’s a lot of questions.
My latches were delivered today and I have done a little tinkering and thinking and testing. I purchased the four 1/16” (1” x 2-1/2”) aluminum backing plates at a sheet metal company today. When l test fitted the backing plate it is about 1/8” or so wider then the edge of the pannier cover, but it seems like that won’t present a problem.