I did a search on the forum and didn't see any posts of a similar mod so I thought I'd share it.
I fabbed up this swing arm bag a while back. I generally just keep gloves and glasses in it. It's sturdy but I prefer to keep only very lightweight items in it. This particular bag's size and position makes it somewhat difficult to fully open the top with the passenger foot peg in place. I never ride with a passenger so I've removed the pegs.
With the peg on, I can open the top of the bag about halfway. It's doable with the foot peg in place but I would have to get down on one knee and sort of blindly reach in and out. Also, with the foot peg assembly in place, swing arm movement brings the bag into fairly close proximity to the bottom of the foot peg when springs are compressed. I imagine if I had a passenger and hit a big bump, this particular bag's dimensions may cause it to contact the bottom of the passenger's show. So, I prefer the current setup. I'll adjust in the future if the future includes a passenger.
Although I generally avoid riding in the rain, I did add rain defectors to the open parts, added drain holes to the bottom, applied rust-prevention methods to all metal hardware, including buttons/buckles, soaked the leather with mink oil, and keep a plastic bag inside to protect the contents.
Anyhow, here are some pics.