This is a new Marble Bouncer Model built to my own designs.
 
 
This time I have designed and built my own marble track. It uses one length of Braced Girder and two lengths of Angle Girders, fastened together through the slotted holes by nuts and bolts. Before you tighten them squeeze the angle girders gently together. This gives the ideal spacing for a 20mm Marble. It sits on top of the track and not on the Braced Girder. There is even room below the Marble for nuts and bolts to fasten the track down.
 
