this  is  getting  exciting
Made  some  progress  with  the  roadbed,  putting  in  Homabed  roadbed  for  the  Harlow  block  area.   I  used  cork  down the    long  narow  shelf  across  the  east  wall.  cork  is  faster  and  easier;  the  homabed  is  a  little  taller,  and  has  a  better  shoulder  profile.   The  edge  of  the  roadbed  is  not  as  steep.    The  extra  height  is  nice,  as  it  allows  the  under  the  tie  magnetic  uncouplers  to  fit  flush.  with  the  cork  road  bed,  I  have  to  shim  the  roadbed  up  slightly,  making  a  very  slight  hump  in  the  track  at  the  uncoupler's  location.
In  the  top  photo,  if  you  look  at  the  bottom  of  the  helix  nook,  you  can  see  a  test  fit  of  the  lift  out    that  will  allow  access  into  the  middle  of  the  helix  nook.    The  lower  level  is  so  low  getting  under  it  would  be  near  impossible.  this  liftout  will  allow  me  to  crawl  in  there  with  only    minor  pain  and  suffering  for  construction,  repair  , cleaning,  and  other  maintenance.   I'm  going  to  use  cork  roadbed,  and  peco  code  100  rail  in  the  return  loop  on  the  bottom  level,  and  in  the  helex  itself,  as  well  as  the  Southern  staging,  so  electrical  conductivity  will  be  maximised  on  the  hidden,  or  rather  unseniced  track.
I  am  very  satisfied  with  the  look  of  this  so  far.   with  21  inch  radiuses  in  most  places,  reduced  to  20  on  my  mainline  up  the  Helix;  the roadbed really   flows,  there  seems  to  be  all  the  room  my  plans  ,  which  were  many  years  in  the  making,  indicate  there  should  be,  if  anything  I  seem  to  have  a  little  more  room.        I  want  to  work  hard  to  make  the  track  flow,,  and  make  sense , for  ease  of  operation,  and  the  elimination  of  bottlenecks.
The  southern  main  line    crosses  the  central  divider  for  the    center  peninsula  to  form  a  return  loop,  which  will  alow  Southern  Trains  to  come  and  Go  in  the  New  Harlow.   this  will  be  a  big  improvement  over  the  old  Harlow,  where  the  Southern   passenger  trains  would  just  back  into  the  station,  and  the  Southern's  frieght  switcher  would    Just push  cuts  of  cars  into  Harlow,  and  drop  them  for  the  Harlow  switcher  to  deal  with.
Where  the  Southern  main  closes  it's  return  loop,  it  crosses  a  lead  to  an  industrial  siding,  and  the  DG CC  & W RR's  main  line  South,  heading  up  the  helix  towoard.   both  of  those  crossings  are  likely  non  standard,  so  I  will  be  hand  laying  them,  and  homabed  is  the  best  for  hand  laying  track.
I  have  closed  the  gap  between  the  cork  road  bed  extension  of   Harlow  yard,  and  the  new  roadbed  near  the  Southern  Main;  and  sanded  the  Homabed  down  to  make  an  even  transformation.   I  need  to  paint  the  cork  roadbed  gray,  (if  the  ballast  chips  off  I  don't  want  to  see  the  brown  roadbed  in  the  resulting  hole);  and  then  I  will  be  ready  to  start  pushing  track  into  the   city  proper.   I'll  run  out  of  room  real  soon,  so  I  am  starting  work  on  the  next  section  of  stud  wall  center  spine  for  the  center  aisle,  which  should  push  the  center  peninsula  another    six  feet  some  odd  inches  .  due  to  the  wider  center  peninsula,  the  next  section  of  Harlow  benchwork  will  be  larger  than  the  entire  old  Harlow,  and  there  is  more  to  come.  this  is  exciting.
Nelson