diff --git a/README.org b/README.org
index bef6afd..2ea1101 100644
--- a/README.org
+++ b/README.org
@@ -4,8 +4,70 @@
 
 This unofficial version of the Stellavox SP8 manuals has been reconstructed from notes, scans and partial transcriptions in the hope it may be useful. There are almost certainly transcription errors, missing data and unreadable 1bit diagrams…
 
+- [[file:Stellavox SP8 Operating Manual.pdf][Stellavox SP8 Operating Manual]]
+- [[file:Stellavox SP8 Service Manual.pdf][Stellavox SP8 Service Manual]]
+
 Any corrections, additions or comments → https://github.com/zzkt/stellavox
 
 [[file:img/stellavox_sp8-4.jpg]]
 
-*
+* edit → guidelines
+
+notes on transcription/editing/formatting/updates/errata
+ - use point rather than comma as [[https://en.wikipedia.org/wiki/Decimal_separator][decimal marker]] (check for OCR errors)
+ - fix obvious spelling errors e.g. 'aand' or 'the the'
+ - page numbers are linked to sections where relevant
+ - diagram links have been added
+ -  metric and/or imperial conversions added inline. e.g 38 cm/s (18 ips)
+ - some footnotes have been included inline
+
+* edit → output
+
+The manuals are in org-mode format and can be exported to pdf from emacs. The LaTeX class `stellavox-manual` is required for  layout and can be added to `org-latex-classes`
+
+#+BEGIN_SRC emacs-lisp :results output silent
+(add-to-list 'org-latex-classes
+             '("stellavox-manual"
+               "\\documentclass[11pt,a4paper,oneside]{memoir}
+\\usepackage{graphicx}
+\\usepackage[style=iso]{datetime2}
+\\usepackage{parskip}
+
+\\usepackage{enumitem}
+\\setlist{nosep}
+\\setlist[enumerate]{itemsep=2pt, topsep=0pt, parsep=0pt, partopsep=0pt, leftmargin=2em}
+\\setlist[itemize]{itemsep=2pt, topsep=0pt, parsep=0pt, partopsep=0pt, leftmargin=2em}
+
+\\usepackage[no-math]{fontspec}
+\\setmainfont{Fira Sans Book}[Ligatures=Common,
+                              BoldFont={Fira Sans Bold},
+                              ItalicFont={Fira Sans Book Italic}]
+\\setsansfont{Fira Sans Book}
+\\setmonofont[Scale=0.9]{Fira Code Light}
+
+\\usepackage{geometry}
+\\geometry{a4paper, textwidth=160mm, textheight=250mm, marginparsep=11pt, marginparwidth=15mm}
+
+\\setcounter{secnumdepth}{0}
+\\setcounter{tocdepth}{2}
+
+\\setcounter{figure}{0}
+\\renewcommand{\\figurename}{}
+
+\\setlength{\\parindent}{0em}
+\\setlength{\\parskip}{0.8em}
+\\renewcommand{\\baselinestretch}{1.1}
+
+\\pagestyle{Ruled}
+
+\\usepackage[colorlinks=true,linkcolor=cyan,menucolor=cyan]{hyperref}
+
+[NO-DEFAULT-PACKAGES]
+[NO-PACKAGES]"
+
+               ("\\section{%s}" . "\\section*{%s}")
+               ("\\subsection{%s}" . "\\subsection*{%s}")
+               ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
+               ("\\paragraph{%s}" . "\\paragraph*{%s}")
+               ("\\subparagraph{%s}" . "\\subparagraph*{%s}")))
+#+END_SRC
diff --git a/Stellavox SP8 Operating Manual.org b/Stellavox SP8 Operating Manual.org
index 8463f7f..f3a4ff1 100644
--- a/Stellavox SP8 Operating Manual.org	
+++ b/Stellavox SP8 Operating Manual.org	
@@ -136,9 +136,7 @@ TO REWIND REMOVE BELT (11)!
 | Triple Playing  TP | 90 min            | 180 min            | 360 min  |
 
 
-
 * 5. Selection of speed and headassembly
-
 ** 5.1 Selection of Speeds
 
 The speed selector switch is located on the right hand panel. It permits the selection of the 3 standard speeds 3¾, 7½ and 15 ips, the major applications of which are as follows:
diff --git a/Stellavox SP8 Operating Manual.pdf b/Stellavox SP8 Operating Manual.pdf
index 702ffd3..1b8f774 100644
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diff --git a/Stellavox SP8 Service Manual.pdf b/Stellavox SP8 Service Manual.pdf
index 2c0cf08..7c8f682 100644
Binary files a/Stellavox SP8 Service Manual.pdf and b/Stellavox SP8 Service Manual.pdf differ