I am looking for a 3D designer to design a "Marble Balance Maze" it needs to be adjustable using knobs (something like this https://www.youtube.com/watch?v=EN-1pWblSAw) to be done on FreeCAD requirements: Maze board size - 20cm x 20cm Wall height - 2 cm Marble diameter - 12mm Printing material - PETG difficulty level - Easy colour - prefer bright colors for kids Knobs should mechanically tilt the board - any mechanism that designer prefers, it should be smooth and accurate Acceptance criteria: Payment will be released after successful print, assembly and testing of the provided design.