// -*- C -*-

pump_dia = 27;
seatstay_mindia = 14;
seatstay_maxdia = 19;
pump_seatstay_gap = 12.3;
pump_seatstay_delta = 0.1;
holes_rotation = 7;

module Holes(){
  translate([0, -pump_dia/2]);
  rotate(-holes_rotation){
    translate([-(pump_seatstay_gap/2 + pump_dia/2),
	       0])
      circle(r=pump_dia/2);
    translate([+(pump_seatstay_gap/2 + seatstay_mindia/2),
	       pump_dia/2 -seatstay_maxdia/2 -pump_seatstay_delta]) {
      hull(){
	for (ud=[-1,1])
	  translate([0, ud * (seatstay_maxdia-seatstay_mindia)/2])
	    circle(r=seatstay_mindia/2);
      }
    }
  }
}

Holes();