Morning all, I'm new to this. I'm normally an rc guy but my son wants a scalextric set for Xmas so I have bought 2 of these C1422M Scalextric Street Cruisers Race Sets. So my question is can I combine them both together to make 1 big track and do I use both power box's or just 1 ? I bought 2 as my other son will want what his big brother has. Or do I need to buy something else to increase the power to support the extra length