$fn = 64;

// --- Parameters ---

// Pot Dimensions (6 inch pot is ~152.4mm)
pot_inner_dia_top = 156;
pot_inner_dia_bottom = 146;
ring_height = 25;
ring_thickness = 5;

// Mounting Arm Dimensions
arm_length = 35;
arm_width = 30;

// Twist-Lock Connector Dimensions
lock_stem_dia = 18;
lock_stem_length = 7;
lock_tab_length = 36;
lock_tab_width = 12;
lock_tab_thickness = 3;

// --- Main Geometry ---

union() {
    // Main Ring and Arm
    difference() {
        union() {
            // Tapered outer ring
            cylinder(
                d1 = pot_inner_dia_bottom + (2 * ring_thickness), 
                d2 = pot_inner_dia_top + (2 * ring_thickness), 
                h = ring_height
            );
            
            // Mounting arm block
            // Starts slightly inside the ring to ensure a manifold union before the inner cut
            translate([(pot_inner_dia_bottom / 2) - 5, -arm_width / 2, 0])
                cube([arm_length + 5, arm_width, ring_height]);
        }
        
        // Inner cutout for the pot (clears out the center and any overlapping arm geometry)
        translate([0, 0, -1])
            cylinder(
                d1 = pot_inner_dia_bottom, 
                d2 = pot_inner_dia_top, 
                h = ring_height + 2
            );
    }

    // Twist-Lock Male Connector
    arm_end_x = (pot_inner_dia_bottom / 2) + arm_length;
    
    translate([arm_end_x, 0, ring_height / 2]) {
        rotate([0, 90, 0]) {
            // Central stem
            cylinder(d = lock_stem_dia, h = lock_stem_length);
            
            // Locking tabs
            translate([0, 0, lock_stem_length])
                linear_extrude(lock_tab_thickness)
                    hull() {
                        translate([(lock_tab_length / 2) - (lock_tab_width / 2), 0, 0]) 
                            circle(d = lock_tab_width);
                        translate([-(lock_tab_length / 2) + (lock_tab_width / 2), 0, 0]) 
                            circle(d = lock_tab_width);
                    }
        }
    }
}