This model is an original design by Meng Ye Gu Shou. Please support original work—designing such models is no easy feat.   The image shows the first version of the model: the missile nose is encased in a shell, and the four wheels require 5-mm metal pins for assembly; the main body and frame are secured with magnets. Almost every joint requires hardware screws for assembly, but this design is highly impractical—difficult to put together and challenging to print.   The printed files uploaded here represent an improved version: it uses four M3×15 screws, making assembly much easier. The sharp tip of the missile nose has been eliminated, and the rear pushrod can be printed as a single piece, allowing the entire assembly to function right after printing. Note that the missile body must be glued to the missile mount, and the rear cover must be glued to the missile body to ensure structural strength; this setup can also accommodate three 18650 batteries.