Upsides To Making A Portal To Heaven  
    To   Build   The  Factory   There   
  
                                          
 First Of  All, Real  Estate:  The Highly 
 Fractalized  Geometry  (Not  Proven  But 
 Likely To Be The  Case)  Implies  Almost 
 Unlimited Room; Even  If The Portal Tech 
 Would  Be  Stolen,  Chances  Of  Running 
 Into  A  Competitor Is  Close  To  None, 
                                          
 Secondly,  The  Resources:  Heavens  Own 
 Alchemical  Properties   (Proof  Exist!) 
 Makes  Most Base  Materials  Easily  And 
 Readily  Available.  Once The  Molecular 
 Movement  Patterns Are Mapped  Out,  Any 
 Compound   Can   Be   Created  Virtually 
 Without                            Cost. 
                                          
                                          
  
   Downsides To  Making  A  Portal  To  
  Heaven  To Build  The Factory  There  
  
                                          
 Current  Portal Tech  Takes  Some Energy 
 To Hold Open,  Which  Isn'T A Problem In 
 Itself. Test  Results  However Has Shown 
 That  Without An Active Tether, Heaven'S 
 Time Flow  Breaks Down Completely.  Even 
 A  Momentary  Fluctuation Of  The Portal 
 Would    Render    All   Remote   Assets 
 Practically  Lost.  Much  Care  Must  Be 
 Taken   To  Maintain  Portal  Stability. 
 (One Option Could  Be  Several  Portals)