phone_cnr_rad,
kppd[0] + hingescrew_head_th + keeper_gap_x_holes);
hex21 = hex20 + hingescrew_portion_len;
-hex22 = hex21 - hinge_x_gap;
+hex22 = hex21 + hinge_x_gap;
hex23 = hex22 + hingescrew_portion_len;
hex24 = hex20 + hingescrew_shaft_len + hinge_x_postscrew_gap;
echo(hex20, hex21, hex22, hex23, hex24);