Spool Holder Extension

I wanted to save a bit of material and was sure that i could take two spools on one set of frames. So i made this adapter to connect two rods together.
Print two for the small one and one for the Big_rod.
Maybe i will make a version that separates the two spools with some kind of disk in between.
I testet it for the standard set and don't know if it works for the other sets too. I would love to hear some feedback.