Hey! Here’s an update on the Looping. Wasn’t shure if this would work at all. But it did the first time! The LEGO Reddish Brown Plastic Hose 22.4 cm (76280) I’m using is al little bit short. This way the looping got a little bit small. Let’s do a double looping next Time!

Hey! Here’s an update on the Flip Flop Routing. This Design is based on the LEGO Technic Rotor 3 Blade with 6 Studs (32125). I had fun building this module. It’s rewarding to watch the balls change their path almost on their own.

Hey! Here’s an update on the Sling. The challenge on this one was very similar to the catapult. The mission was to prevent the ball from missing the track sideways (left or right). The mechanics on this one in fact had many micro changes here and there to finally perfect its functionality.

Hey! Here’s an update on the Catapult. It’s a straightforward design. To add the needed stability I simply stacked two 2 x 16 LEGO Plates (4282). To get the balance right was a trial an error thing. The biggest challenge was to prevent the ball from missing the platform side ways (left or right). I didn’t expect that thing to be an issue in the first place. In the end I use two 2 x 4 LEGO Tiles (71150 / 87079) to stabilize the movement.

Hey! Here’s an update on the growing dominoes. A chain of dominos of increasing size is used to drive the catapult that tosses the first ball for the marble run up to a platform. As you can see the large Domino is mounted on a joint to hit the catapult in a controlled manner. With the prototype there was one issue. It was hard to set up the Dominos to actually knock over each other. To solve this problem a little ground plate with flat tiles and plates with studs is used to guide the domino set up.

Hey! Here’s an update on the Ball Receiver. As you can see there’s some difference between the prototype an the final design. The prototype worked well but I wasn’t happy because the ball could slip away after it hit the receiver and run into other dominos. So finally I went for a component that could pass on the impulse an secure the ball. The width of the receiver can also be altered easily by changing to other axils.

Hey! Here’s an update on the Ball Sender. As you can see there’s not much difference between the prototype an the final design. It worked well at the first try. Actually there’s only one thing I like better about the prototype. It’s the LEGO Hinge Plate (4275 & 4276) because it has no locking which works better in this case. This part seems to be no longer in production. So I used the LEGO Hinge Plate 1×2 Locking (44301 & 44302) instead. I might try out LEGO Plate 1×2 with Handle (60478) and LEGO Plate 1×2 with Horizontal Clip (63868) but I guess it’s not as stable as the current solution.

Hey! Here’s an quick update on the Directional Change. In the pictures above you can see the prototype along with the final design. In the prototype I used some classic LEGO bricks to add some weight to prevent the component form slipping away. In the final design I used the LEGO Flexible Rubber Axle Connector (45590). So the final thing became much smaller and a little bit more elegant. I was happy to minimize the design that way.

There have been countless LEGO marble runs to the present day. I think build these with LEGO allowed for great creativity. What I was looking for in this project was a system that allowed fluid motion, dynamic speed changes and maybe the capability to go for a looping. On my search I remembered this ingenious LEGO Great Ball Contraption (GBC) Layout video by akiyuky. It features a great marble run module. In the picture of this update you can see my first test of this system. Later on I was very happy that it was also possible to build a looping and incorporate the needed seesaws.

Hey! Here’s an litte update on the Domino Design. What first came into my mind is what you can see in the left on the picture of this update. It would have worked but I quickly dropped that design and went for the 2×4 flat tile and the 2×2 inverse tiles. This combination looks elegant and works very well for domino runs. They are easy to set up in an upright position and allow to corner sharply. You also can variate the distance between them easily. I don’t know if you can do all techniques compared to other dominoes. My experience is they push over very fast because of their smooth surface. I also like the sound they make when falling over a lot.