Summary

Printed the one posted HydrogeN. My powder measure holes were narrower and bound up upon installation, so I modded the design to have some tolerance (oval holes, relieved some some areas), Printed in PLA and worked well. Thanks for the design @HydrogeN.

UPDATE

I like the remix from @stah even better. I would recommend printing that one :-) :

https://www.thingiverse.com/make:590693