FES is available as a KIT only for manufacturers, who have undergone a special training of FES installation. Installation of FES system (structural modifications of fuselage, mechanical and electrical installation) requires special tools and equipment as well as certain skills and experiences. Each type of saiplane has some specific features which requires the development od special parts and arrangements. Furthermore, to legaly fly your newly FES equipped sailplane, installation should be done by all the applicable regulations.