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Have you tried this:
SPACEX - ISS Docking Simulator
My first attempt I successfully docked - after more than an hour.
Several more attempts and...
[ATTACH] [ATTACH] [ATTACH] Hey! 30 of my friends & I are dressing up in Astronaut costumes & driving my Tesla Roadster at the front of October 31...
This was just so cool, I had to share!