these are the three parts   the main hole is the Differential  which is the

these are the three parts the main hole is the Differential which is the LARGE hole on the red picture thats the hole im worried about i can drill the rest on the work bench i have found every item except the RED one that guys are printing off

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Did you say that you have a CNC version in aluminum in your possession?

yeah i do

Do you know if there are autocad or similar drawings on the 'net for that particular part?

i been searching .stl and typing 3D img of E-maxx bulkhead no luck i will try autocad img search what other file types are there for 3d? dxf ? is that one like i said im not good at this plus i had to start somewhere an learn

You would want the original .dxf or .dwg file for this type of part. CNC almost always starts with those formats, while .stl comes from the modeling world.

The real jackpot would be if you find a solidworks file for this part, often .sldprt extension. That program converts directly to STL, but I think you’re going to have an easily and frequently broken bulkhead if you print it in a 3d printer.

Did you check out the link in the other posting that shows a seven dollar bulkhead, in stock?