First stept is, to use 18 mm Plywood to cut out all parts on your X Carve.
next you should glue the 4 car parts together.
I did this in two steps by glueing two together and then the resulting parts.
take a 1cm round bar and cut it to length. glue one tyre on it.
Stick it throu the car body and glue the 2nd tyre on.
At this point the car is done.
At this time you add the rope.
You need a holder on the car to get the rope fixed.
I used a frame holder for this.
Afterwards you take a left over round stick, put the “small tyres” on it and you have something to roll the rope on.
Thats it so far. If you are building two of them you can have much fun with a race battle.