include <BOSL2/std.scad>

d_in  = 60;
d_out = 73;
t = 2;
h = 25;
depth = 5;

$slop = 0.75;
$fn = 360;

inter = 0.5; // interference fit of the pins
pin_num = 3;


diff("R", "K") {
    // reference base mock
    // color("red") tube(od=d_out, id=d_in, h=10);
    
    tube(od=d_out+$slop+t, id=d_in-$slop-t, h=h, anchor=TOP);
    tag("R") down(depth) tube(od=d_out+$slop, id=d_in-$slop, h=h, anchor=BOTTOM);
   
    for(i=[0:pin_num-1]) {
        tag("K") zrot(i*(360/pin_num)) left(d_in/2 - $slop/2) cyl(d=inter*2, h=depth, anchor=TOP);
        tag("K") zrot(i*(360/pin_num) + (360/(pin_num*2))) left(d_out/2 + $slop/2) cyl(d=inter*2, h=depth, anchor=TOP);
        
    } 
    
}