Complex Snake Maze

I need 3D printable CAD files for an Escape Room puzzle prop similar to (01 Marble Maze). The puzzle is four duplicate but separate mazes (04 four rectangles). Each maze is a King Cobra on a pile of slate (01 snake, 10 slate). The prop is approximately 100cm square and visually divided into 4 duplicate rectangles (04 four rectangles). Players place a marble in a snakes mouth and roll it through the snakes body to the center of the maze. The tube attached to plywood is just my test prototype (06 tube 01 - 05). (Image 01 snake) shows the path a marble must navigate from a snake's mouth to the center block of the puzzle (08 center block) where the maze path ends (08 maze path end side-cut view, 08 maze path end crosscut view). Where possible, the tunnel must be open on the top (08 Cobra open body 01) so the marble can be seen. The opening is too narrow for the marble to pass through. The tunnel will have a slot in the bottom for a light filament (08 Cobra Head and light filament detail). Using the tunnel end point as the base plane, the tunnel low and high points must be equidistant from the base plane (08 base plane). The maze has LEDs and IR sensors (20 Led dimensions, 20 IR dimensions). Wire paths for these electronics will exit the bottom via the shortest convenient path. All parts of the prop must be SOLID. All potential weak spots (like Cobra teeth) must have support. The Cobra body will be partially embedded in the rocks (01 snake) and, when passing under itself can be completely embedded if necessary. Images (10 Cobra) and (10 Cobra head) show the level of detail needed. ***** The center block and pyramid described below are drawn and not part of this project. **** The puzzle has a 13.5cm square opening in the center for a separate 13cm square block (08 center block). The marble paths will end in the block, where each marble will drop into its own shallow recess (08 center block with pyramid B). When all four marbles reach the block, the block will rise, revealing the four sides of the block. A pyramid rests atop the center block. ***** above Information for reference only ********