Alexthe , the significant height difference between the tall GB28 bag and your small frame certainly poses decaleur challenges.

gugie /Mark Guglielmana may have ideas how to make that work, as well as guidance on your desired use of the VO Constructeur front rack. If you haven’t sent him a PM, do so.

Since this Motobecane is your only bike (correct?), pretty certain you don’t want to pursue modifications that would take it off the road for any length of time.