Towers and Heliproz have the c-spec91 with pump at a great price. Towers also doesn't have the engine in its 2007 catalog! Phaseout?For general flying is this a reliable engine or do I spring for the sz hyper? I have 37 OS and Hyper 50 equipped Raptors which are dead reliable. The new 90 SE on the bench is waiting for power. Decisions decisions!!!!!!!!!