I use a Swift Industries Zeitgeist bag on the handlebar.

[jerzone@techhub.social]

I use a Swift Industries Zeitgeist bag on the handlebar. During first packing trip I discovered the strap/foam spacer mount system doesn't keep bag from rotating, which ended with bag randomly rubbing on front tire. For the GAP/C&O trip I wanted to avoid this and come up with a way to easily mount/remove it from bike for train travel.
So, as the day approached for the trip I was busy in CAD coming up with 3d printed parts that:
A. kept bag a few inches away from handlebar/cables
B. easy hook to slide bag onto
C. horizontal stabilizer to transfer weight load to headset area
1/3 🧵
#BikeTooter #3DPrinted #BikePacking

[jerzone@techhub.social]

Here's a cut-away of the main part. Two of them were snugged up to the handlebar (above cables) and held in place by tie-wraps going through a channel in the print. The slot with circular cutout is for end of knotted paracord that then goes above handlebar, below stem, back above handlebar, and into slot on other adaptor. This helps keep adaptors from rotating, without being overly rigid. The upper right area is what slides into the pack’s support bar slot. There's a long hole down the middle of this part for a 3mm screw to provide additional rigidity. The little slot at bottom is where extra brace attaches, a little horizontal bar that helps transfer rotational loads to the rotating headset. More importantly it keeps the other two parts secured together. Originally tried to glue these, but that wasn’t solid enough and I drilled/screwed them together.
2/3 🧵
#BikeTooter #3DPrinted #BikePacking

[jerzone@techhub.social]

At various stages of design I’d declare it as “good enough”. But trying to remove or install bag the mounts would fall off or get out of alignment and it would be back to the drawing board. I made a bottom brace that screws the two parts together and rests on headset. Swift includes an elastic strap to help secure bottom of bag to bike, mostly keeping it from bouncing around. That strap was final element to snug everything together. To remove the bag unhook strap and simply lift bag off the hooks.
I also trimmed some of the material around the Swift's mounting bar openings to allow more flexible mounting options.

3/3 🧵
#BikeTooter #3DPrinted #BikePacking