The overall proportions are accurate, the joints are flexible, and it can perfectly fit the train model kits with an OO gauge track width.

Circus-themed design, model 3.

The overall production is divided into two main parts: the top and the bottom. The model adopts a clever side-insertion and bottom-lifting locking mechanism, which makes it easy to color the inside of the model and replace the internal accessories with ease.

Designed specifically for a 15-mm wheel diameter.

Although I can also achieve fine molding on that old 2K Mars 2 printer, some parts still need to be fine-tuned to ensure a secure assembly.

I originally planned to print these models and sell them to the public, but... life always has unexpected surprises. Now, I'm gradually making these train models available for download, so maybe more people can earn some money from them.