myProto aims in giving the best price for the desired delivery term. However, there is a possibility that the required components are not available, within the desired time, by our suppliers. In this case, you will be warned instantly on myProto dashboard and notified about potential alternatives. If you chose 5, 6 or 7 days delivery and the delivery term was automatically set at 8 days, it means that the components inserted in your BOM are not available for express delivery from our suppliers. To achieve express delivery, then you have to use Farnell and RS SKU references.