behemoth c beam frame mock up 3d printed nema 23 mount Hiwin hgw15 rails mounted up Z + X axis complete bolting up z axis to x axis bolting up z axis to x axis bolting up z axis to x axis bolting up z axis to x axis stl of drilling template finished rail onto cbeam hiwin mgw15h fitting to profile lock tight to secure each bolt openbuilds hiwin linear rail fitting openbuilds hiwin linear rail 18160 profile filled with concrete 18160 profile filled with concrete  Epoxy filled profile with reo rods and sand three Steel reo rod into c-beam profile Steel reo rod into c-beam profile