1. Good question... is probably no longer so current
2. with FF there is still a power zone, in the app there are the FF voices
3. yes, we do it that way too
4. we have the FF app for all cars, I don't know if it works the other way round.
Yes, the track size is the same. However, there is an exclusive (so far) straight track element (Powerzone) and there are already curve limits in the kit, which you otherwise have to buy separately.