Printed with 30 % infill with PLA. Printed vertically with inner threads at bottom and outer threads facing up. Threads meshed perfectly and attached without any post processing. Seems plenty strong. Perfect addition to allow for spools that are too wide for the stock spool holder!!
Great print. If modified would thread the whole outter shaft to allow for metal nut to be adjusted along whole length, but worked for the quick fix I needed to get my wide spooled filament from blizzard tech printing!