beziercurve profile 6 0 0 20 -10 0 0 -10 0 -40 10 0 -80 10 0 0 0 0 20
mkedge profile profile 
wire profile profile 
mkplane profile profile
beziercurve w 7 0 0 0 0 2000 50 0 1700 700 0 400 300 0 0 0 0 900 400 0 140 100
mkedge w w
wire w w
pipe result w profile

checkprops result -s 301365