$fn=64;

// --- Parametric Variables ---
tolerance = 0.8;          // Extra diameter for easy insertion/removal
pitch = 14;               // Distance between hole centers
sizes = [1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0];
num_keys = 9;

W = 24;                   // Width (depth) of the block
H1 = 12;                  // Height at the small end
H2 = 45;                  // Height at the large end
bottom_thickness = 3;     // Minimum solid thickness below the holes
text_size = 5;            // Size of the embossed labels

// Calculate total length based on number of keys and pitch
L = pitch * (num_keys - 1) + 20; 

difference() {
    // Main sloped block
    translate([0, W/2, 0])
    rotate([90, 0, 0])
    linear_extrude(W)
    polygon([
        [0, 0],
        [L, 0],
        [L, H2],
        [0, H1]
    ]);
    
    // Hex key holes
    for (i = [0 : num_keys - 1]) {
        translate([10 + i * pitch, 0, bottom_thickness])
        cylinder(h = H2 + 10, d = sizes[i] + tolerance);
    }
    
    // Size labels (engraved 1mm deep on the front face)
    for (i = [0 : num_keys - 1]) {
        translate([10 + i * pitch, -W/2 + 1, H1/2])
        rotate([90, 0, 0])
        linear_extrude(2)
        text(
            str(sizes[i]), 
            size = text_size, 
            halign = "center", 
            valign = "center", 
            font = "Arial:style=Bold"
        );
    }
}