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)