Hey there! It's great that you're considering buying a rotary table for making duck calls. Rotary tables can definitely help you achieve precision and accuracy in your work.
When buying a rotary table, it's important to ensure that it's compatible with your equipment. I suggest researching the specific rotary table you found on eBay to see if it's compatible with your equipment. If you need more clarification, you could always contact the seller and ask for more information.