Build Order

    10 – Supply Depot
    12 – 1st Barracks
    15 Orbital Command
    15 Marine (Only one)
    17 Command Center
    ———————Above is 1 Rax FE
    18 Depot
        Resume constant Marine production
    Add on 2nd and 3rd Barracks as soon as possible without cutting SCV or Marine Production
    22 – Refinery
    @60 Gas, Tech Lab on Barracks
    @100% Tech Lab, begin Combat Shields
        Start Stimpack research instead instead if you have been scouted and abandon timing
    @400 Mins, start 3rd Command Center.
    Benchmark: @7:00 Attack with about 16 Marines and 30+ SCVs at home. Combat shields should be  about 50 seconds researched.
    Immediately take all Refineries and choose between double Engineering Bay or faster Factory.
    @ 100% Combat Shields (@8:00ish), begin Stimpack research.