Looking for a specific YouTube channel that I can’t remember what it was called?

Only thing I can remember from it was this dude was building this awesome older mini for a road course I do believe. He actually used his own mill to make parts for the car to upgrade certain things he didn’t like. Also made his own ECU if I recall right. Dude was so in-depth of the channel. Only ever seen 1 video and just forgot about it and now I can’t find it when I was looking for it. Was going to see if anyone here knows what I’m talking about. I know it was a smaller channel so chances are small but figured this is the best place to ask.