layer 6
#extend -rim_2t top_2j_c len 420 -352
-extend -rim_2t top_2j_c len 440 -352
+extend -rim_2t top_2j_c len 445 -352
#extend -rim_2t top_2j_c upto top_0rme1 -352
layer 8
#rel top_45x_tr top_4j20_side_2 0 2 -90
extend top_45x_tr top_4j22 len 180 1000
-extend top_4j22 top_4j21 len 80
+#extend top_4j22 top_4j21 len 80 -1000
+join top_4j22 -top_2j_a 1000 twoarcs
+
#extend top_4j20 top_4j21 len 30 800
#extend top_4j21 top_4j22 len 30 450
#extend -top_4j22 len 0.010 -352
-join top_4j21 -top_2j_a 315 twoarcs
#twoarcs
rel -top_0rm_a top_5j3b 0 -148