The third system is the wireless, programmable, turning retriever systems where the drive motor is generally located with the carriage and makes up one complete unit. This allows the system...
What are the real differences? The second system to consider is a “railed” target retriever where the carriage actually travels on a steel rail mounted overhead rather than a cable....
First is costs and then simplicity of use. A “trolley” type system uses a cable and wire (or cord) to support the retriever and operate the carriage down the range...
There does seem to be a lot of choices and the right choice can be overwhelming and expensive. However, it really comes down to how you envision your range being...