$fn = 64;

// --- Parameters ---
riser_height = 25;           // Total elevation height added by the riser
base_diameter = 50;          // Outer diameter of the main stage
peg_diameter = 35;           // Diameter of the stacking connection
peg_height = 4;              // Height of the stacking peg
tolerance = 0.4;             // Clearance for easy stacking and removal

// --- Module ---
module figure_stage_riser() {
    difference() {
        // Main body and top connection
        union() {
            // Main cylindrical body
            cylinder(h = riser_height, d = base_diameter);
            
            // Top stacking peg (with slight chamfer for easier insertion)
            translate([0, 0, riser_height])
                cylinder(h = peg_height, 
                         d1 = peg_diameter - tolerance, 
                         d2 = peg_diameter - tolerance - 1.5);
        }
        
        // Bottom stacking hole (slightly deeper and wider for a flush fit)
        translate([0, 0, -0.01])
            cylinder(h = peg_height + 0.2, d = peg_diameter + tolerance);
            
        // Optional: Cutout for center peg/stand commonly found on figure bases
        translate([0, 0, riser_height - 5])
            cylinder(h = peg_height + 6, d = 5);
    }
}

// --- Render ---
figure_stage_riser();