Gopas Suction Cup Holder

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/****************************************************************************
 * SUCTION CUP HOLDER                              version 1.0 (2020-02-11) *
 * Copyright (c) Michal Altair Valasek, 2020                                *
 *               www.rider.cz | www.altair.blog                             *
 ****************************************************************************/

/* [General] */
inner_diameter = 56;
height = 30;
wall_thickness = 1.67;

/* [Suction Cup] */
sc_mount_hole_small = 8;
sc_mount_hole_big = 12;
sc_mount_hole_depth = 3;
sc_mount_depth = 7;
sc_mount_hole_top = 3;
sc_mount_width = 40;

/* [Hidden] */
sc_mount_total_size = inner_diameter / 2 + wall_thickness + sc_mount_depth;
$fudge = 1;

// Main shape
difference() {
    // Main circle(ish) shape
    linear_extrude(height) difference() {
        hull() {
            circle(d = inner_diameter + 2 * wall_thickness, $fn = 128);
            translate([0, -sc_mount_width / 2]) square([sc_mount_total_size, sc_mount_width]);
        }
        circle(d = inner_diameter, $fn = 128);
    }
    // Suction cup mount slot
    translate([sc_mount_total_size - 2 * sc_mount_hole_depth, -sc_mount_hole_big / 2, sc_mount_hole_top]) cube([sc_mount_hole_depth, sc_mount_hole_big, height]);
    translate([sc_mount_total_size - 2 * sc_mount_hole_depth, -sc_mount_hole_small / 2, sc_mount_hole_top]) cube([sc_mount_hole_depth * 2 + $fudge, sc_mount_hole_small, height]);
}

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