You need a G27 + a simulator Playseat.
Something like this or this to sucessfully complete the challenge.
It's utmost important that you use the G27 + a feedback seat otherwise you will never be able to do it.
Ignore the dozen or more other threads written in here, asking the same question and getting differente answers.
You can get bronze with controller, I guarantee you that.
For silver and gold however you will need a steering wheel. Unbelievable which changes this makes - so precise.
I've got a Logitech Driving Force Pro... works amazing after 4 years and the X1 challenge... I thought i'm gonna brake the steering wheel after such quick direction changes - worked great tho... took me around 2 hours to gold it all...
Unless you had a stopwatch next to you I doubt that it only took you 2 hours if you hadn't tried the X1 before. But it might have felt that way... well done anyway.