This is actually a slight remix - thanks for including the F3D files - I reduced the depth of the notch for the clip as it wasn't printing well for me. Very happy with the result. Thanks Riadan.
Printed for use with these bushings: https://www.thingiverse.com/thing:16813 (also shown)
I haven't yet tested these.
Awesome :3 Glad that the F3D file helped you :D