// Spacer Block with longitudinal slot and two through-holes
// Dimensions directly from technical drawing (all in mm)

/* [Overall Dimensions] */
// Total length of the block (X axis)
block_length = 50.0;    // [20:1:100]
// Total width of the block (Y axis)
block_width = 30.0;     // [15:1:80]
// Total height of the block (Z axis)
block_height = 15.0;    // [5:1:50]

/* [Slot Dimensions] */
// Width of the longitudinal slot
slot_width = 10.0;      // [2:1:30]
// Depth of the slot from the top face
slot_depth = 5.0;       // [1:1:20]

/* [Holes] */
// Diameter of the two through-holes
hole_diameter = 4.5;    // [1:0.1:10]
// Center-to-center distance between the two holes
hole_spacing = 30.0;    // [5:1:80]
// Distance from side edge to first hole center
hole_edge_offset = 10.0;// [2:1:25]

/* [Rendering & Material] */
part_color = "SteelBlue";
$fn = 64;

module spacer_block() {
    difference() {
        // Base block sitting on the XY plane
        cube([block_length, block_width, block_height]);

        // Full-length longitudinal slot cut from the top face
        // Positioned along the center line in Y (Y = 10 to 20)
        translate([-1, (block_width - slot_width) / 2, block_height - slot_depth])
            cube([block_length + 2, slot_width, slot_depth + 1]);

        // Two through-holes (Ø4.5 THRU)
        // Hole 1
        translate([hole_edge_offset, block_width / 2, -1])
            cylinder(d = hole_diameter, h = block_height + 2);

        // Hole 2
        translate([hole_edge_offset + hole_spacing, block_width / 2, -1])
            cylinder(d = hole_diameter, h = block_height + 2);
    }
}

color(part_color)
    spacer_block();