We offer this service for free. Save your time for researching, just answer a couple of questions and submit a sketch. Then we will be able to give you a recommended total solution for your railing project. The list will include post, fitting, wire rope, tool, price of each item and the estimated budget. So you can just follow the list to buy them all in 5 minutes. A simple sketch would work, you can just draw it with a pen.
The reason for the $20 deposit is that we are receiving more and more requests and we don't have enough engineers to accomplish them all. This service will cost a lot of time to analyze and calculate. So we have to focus on the customers who need it more. The deposit will be refunded to you once you place an order over $100 on our website. Otherwise it won't be refundable . We appreciate your understanding.