9 Piece Cube Puzzle

This is a 9 piece cube puzzle. Once complete, it will form a cube with the center missing on each side. There are a total of 5 unique pieces, but 9 pieces in total. Part 1 is used twice (as indicated in the x2 in the name) and Part 2 is used four times (as indicated in the x4 in the name). I originally made this out of wood around 10 years ago based on some design I found on the internet. I decided to re-create this on my printer. I have attached a solution, however I urge you to try and figure it out without the solution. I printed it in multiple colors so that it would easier to create a document with the solution, however I think it is more fun as a solid color or as move uniform colors. I have tried to find this puzzle online recently, and have been unable to find it again, but used the shapes from the wooden version to create the 3D printed version. I printed in PLA with support, but the support settings that I used allowed them to be removed very easily. The print profile has 5 p