join top_45x_tl top_5j3b 1000 twoarcs
layer 0
-extend top_3lk top_3u1 len 330
+extend top_3lk top_3u1 len 270
rel -top_0rm_a top_3u2 35 -111
-join top_3u1 top_3u2 600
-#cross twoarcs !arcsline
+join top_3u1 top_3u2 800 twoarcs !arcsline
+#cross
layer 4
extend -rim_3t -rim_3tt1 len 30.0