Howto correct use 2d path for turtle3d "extrusion" ?

[karabas2011]

I use turtle for building 2d shapes for turtle3d.
The problem is:|
My paths do not render correctly if difference() used.
But path=circle(XX) renders correctly.

here example.

include <BOSL2/std.scad>
include <BOSL2/turtle3d.scad>
include<BOSL2/skin.scad>

path1 = turtle3d(["up", 5, "repeat", 12, ["move",10,"arczrot",4]],transforms=true);



path = turtle3d([   
		         ["arc",40,"up", 23, "steps", 15, "grow",[1,1.5]],
				 ["arc",60,"down", 20, "steps", 15,"grow",[1,1.1]],
			     ["arc",60,"down", 20, "steps", 15,"shrink",[1,1.2]],
				 ["arc",155,"up",17, "steps", 15,"shrink",[1,1.2]],
                 ["move",45,"shrink",[1,1.1]] 
                ],
                transforms=true);
 

ushape1=turtle(   //does not render
		  ["setdir",[0,-1],
		  "ymove",3,
		  "left",
		  "xmove",-11.2,
		  "setdir",[-1,0],
		  "arcleft",19,30,
		  "arcleft",0.53,120,
		  "arcleft",19,30,
		  "xmove",11.2,
		  "right","ymove",3]
		);		  
              

ushape2=circle(d=25,$fn=16); //does render
           
top_half(s=400)difference(){
down(10)sweep(ushape1, path);
cylinder(d=3,h=40);
}

[karabas2011]

I got answer
Sometimes reverse of the path is required.