Hi John,
It turns out that most of the time we only use two lanes - fours lanes was really overkill and the track would probably just as much fun with just two lanes.
And to be honest, I started out the same way with a Scalextric set, and I think the kids actually like the shorter tracks better, because if the car comes off of the long track, they actually have to get up and go get it (unlike most of their video games!)
I only wish I too had a road ready 40 right now. Most of my slot track was put together to pass the time while I was waiting for my Roaring Forties car to be completed, but that's a whole different story :-(
Enjoy the time with your children, it tends to slip away quickly.
Al
P.S. Don't just blame the American in me - I'm a Swiss citizen too, but guilty as charged