Need spacers for your #saintflint extruder? Napa’s got it. 1/4" Brake line, with a little convincing with a drillbit, will work for ya.
+50 for inventiveness.
Let us know how it turns out. Interested in hearing from someone who isn’t @shauki or @Mauro_Manco .
Oh, there’s definitely something there. It’s a PITA getting the flint wheel off the lighter, but it’s grippy, and the dual path of the extruder meant it’s moving well with reasonably light pressure. The in-and-out on the same side of the extruder and the length of the bowden are a little bit of a hassle, but I can see the potential.
Love this.
I wonder if you could get a threaded rod in the other end for the z axis.
Beer and lighter 
no secure. Mike just play. Surely imperial measure can give some alternative for enlarge shaft,Mike if need show how remove flint from lighter cage . Antony sorry remember saint now born and tested in Portugal(no Germany no italy) Ok no want trust we but result of @Michael_Memeteau talking on him prusa. please try it you too is an alternative for no wait long shipping time.