diff --git a/config/keter.yml b/config/keter.yml
index 2df90a924..3b8c9db84 120000
--- a/config/keter.yml
+++ b/config/keter.yml
@@ -1 +1 @@
-keter_uni2work.yml
\ No newline at end of file
+keter_testworx.yml
\ No newline at end of file
diff --git a/src/Handler/Home.hs b/src/Handler/Home.hs
index dfb28c82b..f68263d7e 100644
--- a/src/Handler/Home.hs
+++ b/src/Handler/Home.hs
@@ -32,16 +32,13 @@ import Text.Shakespeare.Text
 -- import qualified Data.UUID.Cryptographic as UUID
 
 
--- Some constants:
--- nrSheetDeadlines :: Int64
--- nrSheetDeadlines   = 10
+-- CONSTANTS: TODO: make configurable elsewhere
 offSheetDeadlines :: NominalDiffTime
 offSheetDeadlines   = 15
---nrExamDeadlines    = 10
+offCourseDeadlines :: NominalDiffTime
+offCourseDeadlines  = 15
+--offExamDeadlines :: NominalDiffTime
 --offExamDeadlines    = 15
--- nrCourseDeadlines :: Int64
--- nrCourseDeadlines  = 12
---offCourseDeadlines  = 15
 
 
 
@@ -56,7 +53,7 @@ getHomeR = do
 homeAnonymous :: Handler Html
 homeAnonymous = do
   cTime <- liftIO getCurrentTime
-  let fTime = addUTCTime (offSheetDeadlines * nominalDay) cTime
+  let fTime = addUTCTime (offCourseDeadlines * nominalDay) cTime
   let tableData :: E.SqlExpr (Entity Course)
                   -> E.SqlQuery (E.SqlExpr (Entity Course))
       tableData course = do
@@ -64,7 +61,6 @@ homeAnonymous = do
                 E.&&.  (course E.^. CourseRegisterFrom E.<=. E.val (Just cTime))
                 E.&&. ((E.isNothing $ course E.^. CourseRegisterTo)
                         E.||. (course E.^. CourseRegisterTo E.>=. E.val (Just cTime)))
---             E.limit nrCourseDeadlines
             return course
 
       colonnade :: Colonnade Sortable (DBRow (Entity Course)) (DBCell (WidgetT UniWorX IO) ())
@@ -129,7 +125,7 @@ homeUser uid = do
         E.where_ $ participant E.^. CourseParticipantUser E.==. E.val uid
             E.&&. sheet E.^. SheetActiveTo E.>=. E.val cTime
             E.&&. sheet E.^. SheetActiveTo E.<=. E.val fTime
-        -- E.limit nrSheetDeadlines
+        -- E.limit nrSheetDeadlines -- arbitrary limits are not intuitive
         return
           ( course  E.^. CourseTerm
           , course  E.^. CourseShorthand
diff --git a/src/Handler/Sheet.hs b/src/Handler/Sheet.hs
index d9207f0ce..e5fa8e23a 100644
--- a/src/Handler/Sheet.hs
+++ b/src/Handler/Sheet.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE OverloadedLists #-}
+{-# LANGUAGE PartialTypeSignatures #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE QuasiQuotes #-}
@@ -11,7 +12,6 @@
 {-# LANGUAGE ViewPatterns #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE TypeOperators #-}
-{-# LANGUAGE PartialTypeSignatures #-}
 {-# LANGUAGE MultiWayIf, LambdaCase #-}
 {-# LANGUAGE TupleSections #-}
 
@@ -101,7 +101,9 @@ makeSheetForm msId template = identForm FIDsheet $ \html -> do
       <*> sheetTypeAFormReq   (fsb "Bewertung")                (sfType <$> template)
       <*> sheetGroupAFormReq  (fsb "Abgabegruppengröße") (sfGrouping <$> template)
       <*> aopt htmlField      (fsb "Hinweise für Korrektoren") (sfMarkingText <$> template)
-      <*> aopt utcTimeField   (fsb "Sichtbar ab") (sfVisibleFrom  <$> template)
+      <*> aopt utcTimeField   (fsb "Sichtbar ab"
+                                # setTooltip "Falls angegeben, wird das Blatt vor dem angegebenen Datum versteckt")
+                                                  (sfVisibleFrom  <$> template)
       <*> areq utcTimeField   (fsb "Abgabe ab")   (sfActiveFrom   <$> template)
       <*> areq utcTimeField   (fsb "Abgabefrist") (sfActiveTo     <$> template)
       <*> aopt (multiFileField $ oldFileIds SheetExercise) (fsb "Aufgabenstellung") (sfSheetF <$> template)
@@ -139,14 +141,17 @@ makeSheetForm msId template = identForm FIDsheet $ \html -> do
         -- TODO: continue validation here!!!
       ] ]
 
--- List Sheets
--- getSheetListCID :: CourseId -> Handler Html
--- getSheetListCID cid = getSheetList =<<
---   (Entity cid) <$> (runDB $ get404 cid)
+
+
+-- colShn :: IsDBTable
+
+makeSheetTableUser :: ( IsDBTable m x, DBOutput CorrectionTableData r', ToSortable h, Functor h )
+                     => _ -> Colonnade h r' (DBCell m x) -> PSValidator m x -> Handler (DBResult m x)
+makeCorrectionsTable whereClause colChoices psValidator = do
+
 
 getSheetListR :: TermId -> Text -> Handler Html
 getSheetListR tid csh = do
-  -- mbAid <- maybeAuthId
   (Entity cid course, sheets) <- runDB $ do
     entCourse <- getBy404 $ CourseTermShort tid csh
     rawSheets <- selectList [SheetCourse ==. entityKey entCourse] [Desc SheetActiveFrom]