So finally fixed my Pannier and installed external latches.
History:
Jan 2023: Left Pannier latch problem, tried to fix with j-b weld. Worked for some time.
Sep 2024: the left latch gave up and popped open on Highway and did not want to stay closed. Lived life with keeping it closed with a strap.
Aug 2025: decided and fixed the latch and also reinforced all nut bosses in the panniers and the saddle bag plastic.
Some tools used (besides the regular needed tools)
1) Painter tape, man this is awesome, does not stick to J-B Weld, helps a lot. Also does not mar the plastic and comes off easy. Prevented a lot of scratches to the plastic.
2) J-B weld: this is gold. I used steel stick (& plastic stick) and reinforced all nut bosses: Inside the saddle bag (4 on each side) that hold the latching mechanism, the ones for the retain strap (2 on each side). Note: steel stick is very stron but sets in 5 min, Plastic stick sets in 20 min, but is much less strong.
3) Dremel tool with sanding drum, various grinding stones and carbide burr: helped shape and smother the J-B weld and the aluminum plates.
4) Aluminum ruler form Harbor Freight: used it to get 1 inch wide aluminum strips for back plates.
5) A steel lumber reinforcing plate with 1/8 inch holes, I used it as a guide to drill holes (avoid drill bit wander). Clamped it to the lid and did the hole. Worked very well.
6) Used a large HF parts box with Used lid for storing he screws etc. Then I wrote the location of the screws on the lid. Worked well.
Lots of thanks to
@Brillot2000 (his info and his album was very very helpful) and
@mikesim , and the others.
So here are the pics:
For left pannier, I misjudged the distance, so had to drill at an angle for the front , so I fashioned a l shaped back plate. For the Right pannier, the front screws were fine, but the rear are close to the inner lip. Unfortunately, due to the design and hole gap in the latch, this problem will be there. Right now , I am using nuts and bolts, but will transition to rivets soon.
All back plates are stuck using J-B weld, so they are not going anywhere.
Will paint the insides as back and the outside as silver too.
Happy to report that there were no extra screws left over
But I stored the right pannier strikers and screws so safely that I cant find them
Cheers