include ; use $fn = 90; difference() { union() { cylinder(r = bottom_outer_diameter / 2, h = bottom_height); translate([0, 0, bottom_height]) cylinder(r = insert_diameter/2, h = insert_length); arms([0, 180], arm_radius, arm_dia/2, arm_dia); arms([90,270], arm_radius, bottom_short_loop_arms_height, arm_dia); } union() { cylinder(r = bottom_inner_diameter / 2, h = bottom_inner_depth); cylinder(r = insert_hole_dia / 2, h = insert_length + bottom_height); arms([0, 180], arm_radius, arm_dia / 2, arm_hole_dia); arms([90,270], arm_radius, bottom_short_loop_arms_height, arm_hole_dia); arms([0,180], bottom_outer_diameter / 2, bottom_short_loop_arms_height, bottom_work_hole_dia); } }