Posted on April 30, 2012April 30, 2012 by Jed Mobile Turret (Spider-Tank) Instructions. Build instructions for the Mobile Turret (aka Spider-Tank) are now available. Please note that this model requires a moderate level of skill to complete. mobile turret instructions Post navigationPrevious post: Viper Armoured Reconnaissance Vehicle now in store.Next post: NRF Infantry Squad now in store