x_smooth_rod_length=450+board_thickness*2+10;
// X ends
-translate([-board_w/2+4+12-board_thickness,-26+12-board_thickness,140+ x_axis_height])
+translate([-board_w/2+4+12-board_thickness,-26+12-board_thickness, 200+ x_axis_height])
rotate([0,0,90])
//rotate([0,180,0])
-render(convexity=4) x_end_motor();
+render(convexity=4) mirror([0, 0, 1]) x_end_motor();
-translate([board_w/2-4-12+board_thickness,-26+12-board_thickness,140 + x_axis_height])
+translate([board_w/2-4-12+board_thickness,-26+12-board_thickness, 200 + x_axis_height])
rotate(90)
//rotate([0,180,0])
-render(convexity=4) x_end_idler();
+render(convexity=4) mirror([0, 0, 1]) x_end_idler();
// bearing guide
translate([board_w/2-4-12+board_thickness-27,-26+12-board_thickness-9-(10-(7+0.9*2))/2,140 + x_axis_height+27])