Huzzle Cast Delta Hanayama Puzzle - Level 3 (Difficulty Normal)

This Delta puzzle is formed by joining three separate pieces that mesh with each other. It's the brain-child of Hong Kong native Kyoo Wong who, with the eye of an engineer, has worked on a number of Cast Puzzles. While simple in form, is geometry somehow challenges and stirs up our creativity.
The theme of this Delta puzzle is the number three.