We will accept returns within 30 days of placing your order and issue a refund only on Unused and Uninstalled parts. You are responsible for return shipping and once we verify that the parts have not been used or altered in any way, we will issue a refund back to your payment method immediately. Please be certain of which parts you need before placing an order. This can be done either by researching the parts before hand or calling Russ at 1-330-898-6989 to discuss which parts will work best for your manual conversion.