cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
cpp2r = cpp2 + [1,0] * catch_cr;
cpp2d = cpp2 + [0,-1] * catch_cr;
cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
cpp2r = cpp2 + [1,0] * catch_cr;
cpp2d = cpp2 + [0,-1] * catch_cr;