TIER 3 Ship in REGULATION XIA SPEC!! 3mm mount hole. The Slipstream BR-2 came to be after numerous captains' requests for a larger, more heavily armored ship. Yes, apparently the BR-1 just wasn't BIG enough!?! Subsequently, the BR-2 Super Heavy was born. The E designation retains the extended flight control surface ring to compensate for its overbearing mass when in atmosphere and to concentrate warp output in vacuum.The Engines were overhauled from the extended IV Series ensuring adequate thrust even with a full payload and it has retained the Slipstream's overall encompassed hull design making it an extremely durable, solid ship. Newly redesigned plating to protect the primary engine heat exchangers. SLIPSTREAM SHIP SYSTEMS: slight mitigation of any environmental damage. This model has been hollowed and is Optimized for WSFP.