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This probably wouldn’t work for you but
it works with larger conduits and pipes,
I’ve never done this, but my friend told me:
Get a little battery powered toy car, put a
string on it, and let it drive thru the pipe.
When it comes out the other end, you can
grab the string and achor it on the far end.
Then you can attach wires onto the begining
of the string at the start of the pipe. Then you
can pull through bigger and bigger wires.
It’s a fun little idea to tell, anyway.