It's great to hear about your selfmade weight for the tractor! Having the ability to adjust the weight configuration from 200kg to 2100kg by adding railroad pieces to the frame is very practical and convenient for various loading needs.
The main purpose of the weight being to act as a counterweight on the back of the tractor while loading heavy items is essential for balancing the weight distribution and ensuring stability. It's a smart and cost-effective solution to have a base price of $500 and an additional $25 for each added piece, allowing users to customize the weight according to their specific requirements.
The recommendation to lower the weight before detaching is crucial for safety reasons, as it can prevent potential accidents or injuries during the removal process. Additionally, having the main and design color configuration options adds a personalized touch to the weight, making it visually appealing and easy to identify.
Overall, your selfmade weight design seems well-thought-out and functional, providing users with flexibility, safety, and efficiency in their tractor operations. Well done on creating such a versatile and practical tool for heavy-duty tasks!