housekeeping, and add beams

.gitignore

README.md

beams/RCT N17 Beam Fab Scratchpad.3dm

beams/RCT N17 Beam P3 5_64 Acrylic.step

beams/RCT N17 Heavy Pinion 5_64 Acrylic.3dm

beams/RCT N17 Linear Pulley 5_64 Acrylic.3dm

beams/RCT N17 Linear Pulley 5_64 Acrylic.step

beams/README.md

gantries/n17_heavyPinion/RCT Heavy Pinion v13.f3d

gantries/n17_linearPinion/RCT GT2 Static Belt Mount v3.f3d

gantries/n17_linearPinion/RCT GT2 Static Belt Mount v3.step

gantries/n17_linearPinion/RCT N17 Linear Pinion v27.f3d

gantries/n17_linearPinion/RCT N17 Linear Pinion v27.step

gantries/n17_linearPinion/README.md

gantries/n17_linearPinion/n17-assem.jpg

gantries/n17_linearPinion/n17_linearPinion_explain.jpg

gantries/n17_linearPinion/n17_linearPinion_partsCallout.jpg

gantries/n17_linearPinion/shoulder-alternative.jpg

gantries/n17_linearPulley/RCT N17 Linear Pulley v11.f3d

gantries/n17_linearPulley/RCT N17 Linear Pulley v11.step