A few possible plan options.
As for breaking i have a few ideas.
could have a lever that when pulled it raises bristles up between the track sleepers to slow down the wagon.
could have a long thin strip of balsa running the lenght of the track straights attached to a leaver to raise and lower it to slow down the wagons.
Also have to decide if it will be an actual hump, or the hump line will be on a slope and the rest level or have everything behind the hump on a gentle slope down.
Still a lot of thinking and deciding to do.
All ideas help hints and tips welcome.
So all aboard and throw your spanners in the works to help me along
Cheers
Danny AKA Chevron