Snap-in Filament Spool Holder

My contribution to the vast collection of spool-holding accessories. This is for the spools I had on hand with a 53mm hole. I designed this as primarily an exercise to see how much flexibility there is in PLA parts. I printed this at 50% fill, but the wall thickness is so small I don't think that matters much. I have included the Solidworks (2013) file to allow for modifications.

Note - be extremely careful when removing from build plate, as it is easy to snap off the fingers. Pry from t