A modification of a"Really Usefull Box", to gain place, and be able to transport the box in bike or scooter.
You can use elastics or velcro for the fuselage.
Here, the bag I used: https://a.aliexpress.com/_Ezd6X5E

The box is a Really Useful Box, 25.5 x 15.5 x 80 cm, 22 l.
https://www.digitec.ch/en/s1/product/really-useful-box-box-rangement-22l-avcompar4l-255-x-155-x-80-cm-22-l-storage-boxes-37135122?supplier=2057753

Here if you want to print it: https://Rimaker3d.com

Be carefull when you cut the box, I advise you to put gloves
I heated the cutter blade with a flame.

I designed this with Freecad, files are coming.
Print: "Wing_support" 1 x 100%, 1 x 90%, "Fuselage_support" 2 x 100%