$fn = 64;

// --- Parametric Dimensions ---
length = 130;
width = 40;
height = 40;
v_groove_radius = 8; // Creates a 16mm wide, 8mm deep V-groove
slope_start = 85;

difference() {
    // Main block body
    translate([0, -width/2, 0])
        cube([length, width, height]);

    // 45-degree chamfer cut to create the angled face
    translate([slope_start, -width/2 - 1, height])
        rotate([0, 45, 0])
        cube([height * 3, width + 2, height * 3]);

    // Bottom V-groove for centering on pipes or corners
    // 45-degree walls are 3D printable without supports
    translate([-1, 0, 0])
        rotate([0, 90, 0])
        rotate([0, 0, 45])
        cylinder(r=v_groove_radius, h=length + 2, $fn=4);

    // --- 90 Degree Guide Holes ---
    // 4mm hole
    translate([12, 0, -1]) cylinder(d=4, h=height + 2);
    // 6mm hole
    translate([24, 0, -1]) cylinder(d=6, h=height + 2);
    // 8mm hole
    translate([38, 0, -1]) cylinder(d=8, h=height + 2);
    // 10mm hole
    translate([54, 0, -1]) cylinder(d=10, h=height + 2);

    // --- 45 Degree Guide Holes ---
    // 4mm hole
    translate([93, 0, 32])
        rotate([0, 45, 0])
        cylinder(d=4, h=height * 3, center=true);
    // 6mm hole
    translate([103, 0, 22])
        rotate([0, 45, 0])
        cylinder(d=6, h=height * 3, center=true);
    // 8mm hole
    translate([113, 0, 12])
        rotate([0, 45, 0])
        cylinder(d=8, h=height * 3, center=true);
}