The spare parts we sell are sold implying possession of the technical knowledge necessary for correct diagnosis, repair and/or assembly. For reasons of time we do not provide technical support, if you do not have the necessary basis we recommend you contact your trusted repairer. The spare parts we sell are intended for those who possess the necessary technical knowledge for correct diagnosis, repair and/or assembly. For time reasons we do not provide technical support. If you are unsure, we recommend that you rely on a professional. We can issue an electronic invoice. It must be requested at the time of purchase in the order notes, indicating all the data. Alternatively, you can send a message via the "Add a message to seller" option. Our feedback is a guarantee of seriousness: we ask for.