A grease removal system for a combination oven, requiring venting and condensation of steam, conducts excess grease through the same drainpipe as the steam to a water-filled condenser, then segregates the grease within a reservoir wall. The cap is attached to a reservoir having a threaded portion that screws into a threaded portion of the cap. In another embodiment, a fiber optic connector assembly includes an optical fiber having a fiber end, a connector housing, and a substrate within the connector housing. The aircraft control system may be embodied as a flight game.