We can provide you with professional design assistance. For small projects, like a simple cable, there is no charge for a couple of hours of design assistance. For larger projects, like a complex control box, we simply bill you by the hour. We are not an engineering firm so our hourly rates are very reasonable. But, because we aren’t an engineering firm, we ask you to consider our design assistance to be a suggestion. In the end, you have the ultimate responsibility for approving the final design.