Marble Night City Completed and Reviewed

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Marble Night City Link
www.robotimeon...
Model Tool kit with files: a.co/d/05eXZXIh
Here is the completed Marble Night City build by ROKR.
If you are new to building these wooden projects I don't recommend this one to start out with, instead start with the Marble Spaceport it is much easier to put together and I had few if any breakages.
This was a difficult build at times and had several breakages. I will give page numbers below for areas to be careful of or that need some attention to make sure they work properly. Upon completion, it worked pretty well after I made some adjustments with a small wood file. The hand crank operation was very smooth.
List of breakage points
Page 11, Part H3:Central transport gear, the instruction here is difficult to follow. I inserted the part wrong and it snapped taking it back out. There wasn't a replacement part for this piece.
Page 16, Part I2: This is plex-glass piece that has a very thin area together with a hole right in line with the thinest area. If you're really careful inserting it into its wooden piece, maybe lie it down on its side? Maybe it won't break on you.
Page 20, Part A23 and A5: Both broke, there are replacements. They are made of very thin wood and will snap as you try to insert the tiny wooden pins to mate them.
Page Part C25: This is the wooden spiral. Once you've got it in place up top and you're trying to secure the bottom you may need to use a small wood file to reduce the lip that holds the end of the spiral. If you file just enough off to get it in there maybe it won't snap. If you file too much off though, it won't hold at all. I ended up hot-gluing this down to ensure it stayed in place. There is no replacement part for this.
List of areas that needed adjustments.
Page 8 & 9, Part C6 fits into J3 and J4. I had to file the top on C6, really just rounding the top on one side of it to allow enough space for the balls that fall on top of it to drop when a ball triggers part C6 to move or flap.
Using a connecting kit the Marble Night City can be joined with the Marble Space Port.