@ josh300476 thank you very much, mate!
These miniblock tracks are actually pretty easy to build. They came with the latest update in June and are specifically designed for these tight and narrow tracks with multiple paths going under and over and through the others.

:) OMG! Wow, The halfpipe and the blue section of this track was my absolute favourite. How you managed to design the crazy (very cool) blue multi lane split tunnel track is still boggling my mind. I've watched the race several times and still trying to figure out weather the marble that enters on the left side actually emerges on the left onto the next track type. Also, riding the halfpipe section was like a crazy waterslide. I didn't want it to end. :) Epic creation and well done!