Tangram Puzzle "Pentashift"

thingiverse

I designed a 3D tangram puzzle for my dad's birthday, and it took him over seven hours to solve it. Now, I'm curious - how long will you need to figure it out? The rules are simple: no parts can be forced into place or broken, and the puzzle must be solved within the small base. Plus, all numbers on the pieces must face up. If you have a big printer, you can print everything at once using the "allpartsatonce" file. Alternatively, you can print the lid, base, and parts separately with the other three files labeled accordingly. Don't worry, I've included a spoiler alert for you - if you want to peek at the solution, just head over to https://drive.google.com/open?id=15B8uuYBoZVHC3eljSHLv9ulVpsLrEcWX