$fn = 64;

// --- Parameters ---
rail_thickness = 5;       // Thickness of the rail
rail_height = 25;         // Height of the rail
wall = 3;                 // Wall thickness of the attachment
clip_length = 40;         // Length of the rail clip along the rail

holder_inner_dia = 35;    // Inner diameter for the scoop handle
holder_height = 30;       // Height of the scoop holder section
slot_width = 18;          // Width of the front opening to slide the handle in

// --- Main Model ---
difference() {
    // Solid body
    union() {
        // Rail clip body
        cube([clip_length, rail_thickness + (wall * 2), rail_height + wall]);
        
        // Connection bridge between clip and holder
        translate([0, rail_thickness + wall, 0])
            cube([clip_length, (holder_inner_dia / 2) + wall, holder_height]);
            
        // Scoop holder outer cylinder
        translate([clip_length / 2, rail_thickness + (wall * 2) + (holder_inner_dia / 2), 0])
            cylinder(h=holder_height, d=holder_inner_dia + (wall * 2));
    }
    
    // --- Cutouts ---
    
    // 1. Rail slot (cut from bottom up)
    translate([-1, wall, -1])
        cube([clip_length + 2, rail_thickness, rail_height + 1]);
        
    // 2. Scoop holder center hole (tube for the handle)
    translate([clip_length / 2, rail_thickness + (wall * 2) + (holder_inner_dia / 2), -1])
        cylinder(h=max(holder_height, rail_height + wall) + 2, d=holder_inner_dia);
        
    // 3. Scoop holder front slot (opening for the scoop neck)
    translate([(clip_length - slot_width) / 2, rail_thickness + (wall * 2) + (holder_inner_dia / 2), -1])
        cube([slot_width, holder_inner_dia + wall + 2, max(holder_height, rail_height + wall) + 2]);
}