Solution for Oskar's Big Knot puzzle

These images depict the assembly process of Oskar van Deventer's Big Knot puzzle. Pieces that are "new", or have been moved are drawn in green, others are drawn in brown. (Drawings by Oskar.)
There are five different kinds of pieces used in Big Knot:

The letters that are shown on the ends of the pieces are for identification in these images; they are not present on the pieces of the real puzzle.
The puzzle consists of 5 pieces of type A, 4 of type B, 1 of type C, 1 of type D and 1 of type E.

Take one piece of type B and position it on your working surface like this:

Insert a piece of type A:

Insert one piece of type E and one of type D. The opening in the piece of type E should face backward, the "long end" of the hole in the piece of type D should be at the top:

Insert one piece of type A and one of type C. The opening in the piece of type C should be at the top:

Insert two pieces of type B:

Insert two pieces of type A (you will have to raise the sub-assembly consiting of two pieces of type B, one of type A and one of type C a bit to accomplish this):

Hook one piece of type A onto the piece of type E:

Slide in one piece of type B, then slide the piece of type D down:

Slide the piece of type A that was hooked on the piece of type E in:

Move the piece of type D back up:

That's it.