6 pump_seatstay_gap = 12.3;
9 translate([-(pump_seatstay_gap/2 + pump_dia/2), 0]) circle(r=pump_dia/2);
10 translate([+(pump_seatstay_gap/2 + seatstay_mindia/2), 0]) {
13 translate([0, ud * (seatstay_maxdia-seatstay_mindia)/4])
14 circle(r=seatstay_mindia/2);