Hello! This is Alex here from M&H Racing. I am commenting here as the comments for the Marble Autobahn review video are disabled. First off, thank you for the feedback. It really helps me improve the design for everyone during future releases. I am very sorry to here your experience with the marble track. My goal with this track was to provide everyone a much easier way to have an intense marble race, but from your review I can tell that I didn't accomplish my goal on that front. I partnered with a 3d printing supplier (Shop3d) to print these and while the samples came out really nicely, the customer versions turned out to be a lot poorer quality, based on other private reviews I gotten. This is on me and I should've done more research before going forward with that company. I have since cut ties with them and am looking for another manufacturer at this moment. This kind of experience is not what I want when I offer a marble track to my subscribers. So I'm hoping I can make it up for you. I've gotten great feedback from people like yourself who bought this track on how it can be improved, so I am redesigning the connectors so it's easier to take apart and put together. And I found another manufacturer that looks a lot more promising than Shop3d (they're Rexroi if you're interested). Once I finish the new design, would you be interested in testing them when they're complete?

I have some small balls bearings approx 5mm you could have, could mix it up a bit. Curious to know if would actually work!