MPSM v2 Bed Mount Remix

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4326413.

Minor remix of my MPSMv2 bed mount for bed wire rerouting and MPSM Rewire Connectors by shep44.

This takes the cable chain mount and adapter it to use the bed rail screws.

6/13/2020: Re-uploaded after fixing some odd artifacts from the imported shepp44 bracket. Please use v2.