The orbit unit or the Jet-tronics sequencer will do the trick, but you will need a separate servo slow unit for the canopy servo. On the Orbit you can set it up with end switches.
Another one that might do it all alone is the EMS Jomar sequencer. The website has little info, but you can adjust retract speed with it. http://www.emsjomar.com/SearchResult.aspx?CategoryID=6

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