Small spool
thingiverse
I found Tamel55's design great but encountered problems with the inner wall on the male screw being too thin when scaling down (which I needed to do in order to fit my printer's buildplate). The wall has been increased by 0.8mm which should allow for two extra passes on a 0.4mm nozzle - this is the file ending in M3 I have scaled down the original to 80% size and been able to print fine. I also did the same with the Wile design which has a thinner end plate _2 was increased by the same dimensions as the original Tamel55 version _3 was increased a little more to potentially scale down some more.
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