I have to say that I envy all of you with 100% bulletproof recall!
I was not able to get to this result,we are still in training... I mean my dog generally comes back but not always, and there are situations in a suburb environment that make him decide not to listen.
I consider him an independent soul ;-)
he is trained with an invisible fence, as I have a small yard and cars are passing by right in front of my front yard.
so, outside in the yard he wears his e-collar, even if there are times I do not put the collar on, as he knows very well the perimeter.
life in a busy suburb with a BC involves quite some management as the amount of stimuli is often high, with different things happening at the same time.
as already suggested, herding is a very good off leash activity and a way to practice recall.
car fixation can be controlled with desensitization and counter-conditioning. my dog was like yours, everything on wheels was a huge trigger; he would either over-react or become frozen on the spot fixating on the moving thing.
he took a full year to have him ignore moving things and we still have some issues with the school bus...