In the vast majority of cases, no. If you have special requirements, such as specific hardware, we can discuss this with you. However, it's important to note that often the quantities required or the quality of materials supplied do not meet our high quality standards. For this reason, we generally refuse to use customer-supplied materials. If your question is about saving on the cost of your custom project, it's important to underline that this will have a limited impact. Most of the cost of your project is based on the estimated number of working hours. Materials represent a relatively small fraction of the total cost, and we are often able to negotiate advantageous wholesale prices for you.