Improved mini spice rack for Bormioli 8 cl and 4 cl jars

Compact spices rack for hanging Bormioli Rocco (popular italian brand of glassware) 4cl and 8 cl jars.

The jars are suspended by the collar, held by the snap fit prongs, there is an additional 10 degrees slant to prevent them from sliding even if the prongs wear off a little or lose elasticity over time.

If a prong fails entirely, it can now be replaced without re-printing the whole shelf, but since they are printed flat, I expect them to be fairly durable. 

The prongs are held to the rail by heat inserts and M3 screws. I recommend minimum M3x6, I used M3x8, and the cavity is deep enough to accomodate up to M3x16).

I also added a version of the bar with nut slots on the backside instead of inserts. It is untested, and it requires minimum M3x12 screws (M3x8 might barely work)... If you hate inserts, at least it is an option. I also suggest a drop of glue to hold the nut in place, once it is on the wall the slot will be covered and the rail will have to be taken down if a nut slides out of place when you remove the screw.

Warning, the 25 cl jars use the same caps and have in theory the same collar diameter, but they cannot be used because the jar itself "bulges" a little bit more, so they would bump into each other and the wall.