OpenRC truggy Rear wishbone (multi length choice, metal HSP02024 diffrential)

This design for OpenRC Truggy， reare wishbone

* with a strong link on the wheel slot.
* use 14mm screw mount rear c-cup
* original openrc length 101mm
* HSP metal Diff (93.5mm)
* HSP metal HSP 02024 Diff with extra length 95mm

much stronger.
front wishbone:
https://www.thingiverse.com/thing:2849601