Sculptr Delta Extruder arm Endpieces for M3/M4 threaded rod

I cut off the middle part off the 150mm Arms and made a m4 hole in the middle.
I use it with a M4 threaded rod so I drilled it out a bit (at first I thought I had m3)
It gives a lot more stiffness to the extruder arms and as an additional bonus you can adjust the hole to hole distance really precise with the threaded rods.

(corrected the mistake I made in naming it it's actually for m3 and ,m4 (stupid me for saying m5 you will destroy it) if you use if for m4 drill it out a bit )