4 simple CAD 3D print ready items required (drawing supplied) - ongoing work

I have provided a basic design of a piece of furniture that I would like to provide to a CNC fabricator to be cut out for assembly. I need my Powerpoint sketches turned into a 3D design and the component pieces layed out for cutting on the two pieces of plywood to be used. This design will be sent to the CNC fabricator for cutting.

I need a simple revision of this design. It was created in SolidWorks but I guess it can be revised in any 3D CAD software as long as the file is saved .STEP. A mold will be made from this in a CNC Milling Machine but as it is now can't be made because there is a space between the snakes body and the top of the skull. The body of the snake has to move down. See attachment 2 for exact position. You can download the original STEP file to work on. It is the first attachment but might take a few minutes as it is a large file.

I have made a prototype of the attached drawings but the gears didn't have enough torque and the wheels slipped on wet floors. I made the following changes to the prototype I built: 1. I duplicated the front Wheels (Part #23) to replace the back wheels (Part #3) 2. I duplicated the Roller GearWheel V2 (Part#9) to make the back wheels work the same as the front wheels 3. I duplicated the Reducing Gear (Part #24) to connect the new back wheels to the gear mechanisms The gear torque works great now but the 4 wheels still don't have enough surface contact to stop slipping on the wet floor. I believe all 4 wheels need to be wider to have more surface contact to stop them from slipping (hydroplaning). Challenge: I need the wheels to (#23) to be as wide as possible and change as LITTLE as possible to the rest of the parts and avoid extra costs. I am pretty sure I will need to re-print the Reducing Gear (#24) to make the wider wheels work with them. If I have to adjust the holes on the Plate (#7), I would like to do it with a drill instead of reprinting them. I am hoping there will not be any changes needed to Roller GearWheel V2 (#9)

CAD File Markups See attached 7 Electrical CAD Files, also see attached the construction handwritten mark-ups. CAD Files to be revised to new version with the mark-ups. Return copy of CAD File and PDF of the 7 files. Need completed this weekend, thanks!

AUTOMATION FOR DAILY 2D DRAFTING TASK.