carriagex_sizex = 90; carriagex_sizey = 30; carriagex_sizez = 115; carriagex_bot = gantry_clear; carriagex_top = carriagex_bot + carriagex_sizez; carriagex_posy = gantry_sizey - gantry_thick - 2; carriagex_arm_posy = carriagex_posy-carriagex_sizey; carriagex_arm_sizey = 30; carriagex_arm_sizez = 10; carriagex_rail_size = 6; carriagex_rail_posy = carriagex_arm_posy - carriagex_arm_sizey/2; carriagex_rail_offx = 1.5*carriagex_rail_size;