diff --git a/4PointCutting/4Pcut_execute.lua b/4PointCutting/4Pcut_execute.lua
index aa1900d..0999793 100644
--- a/4PointCutting/4Pcut_execute.lua
+++ b/4PointCutting/4Pcut_execute.lua
@@ -22,6 +22,10 @@ local mark_dstin_pos = -1
 local mark_dstin_id = -1
 local mark_dstout_pos = -1
 local mark_dstout_id = -1
+local edit_mode = 0 
+local waitcount = 0
+-- edit modes: 0=not enough markers set; 1=src-in, src-out, dst-in; 2=src-in, src-out, dst-out;
+--          3=src-in, dst-in, dst-out; 4=src-out, dst-in, dst-out; 5=all four markers set;
 
 -- Send a message to the console
 function msg(m)
@@ -97,17 +101,27 @@ for i = 0, nof_markers - 1 do
     end
 end
 
+-- set edit mode depending on which markers are set (see comments next to definition of edit_mode)
+if mark_srcin_id >= 0 and mark_srcout_id >= 0 and mark_dstin_id >= 0 and mark_dstout_id < 0 then
+    edit_mode = 1
+elseif mark_srcin_id >= 0 and mark_srcout_id >= 0 and mark_dstin_id < 0 and mark_dstout_id >= 0 then
+    edit_mode = 2
+elseif mark_srcin_id >= 0 and mark_srcout_id < 0 and mark_dstin_id >= 0 and mark_dstout_id >= 0 then
+    edit_mode = 3
+elseif mark_srcin_id < 0 and mark_srcout_id >= 0 and mark_dstin_id >= 0 and mark_dstout_id >= 0 then
+    edit_mode = 4
+elseif mark_srcin_id >= 0 and mark_srcout_id >= 0 and mark_dstin_id >= 0 and mark_dstout_id >= 0 then
+    edit_mode = 5
+end
+
 -- error messages
-if mark_srcin_pos < 0 then
-    msg('Please set Source-In Marker first!')
-    return
-end
-if mark_srcout_pos < 0 then
-    msg('Please set Source-Out Marker first!')
-end
-if mark_dstin_pos < 0 then
-    msg('Please set Destination-In Marker first!')
+if edit_mode <= 0 then
+    msg('Please set at least 3 of the 4 markers first! Aborting.')
     return
+elseif (edit_mode == 1 or edit_mode == 2 or edit_mode == 5) and (mark_srcin_pos >= mark_srcout_pos) then
+    msg('SRC-IN Marker must be set left of SRC-OUT marker! Aborting.')
+elseif (edit_mode == 3 or edit_mode == 4 or edit_mode == 5) and (mark_dstin_pos >= mark_dstout_pos) then
+    msg('DST-IN Marker must be set left of DST-OUT marker! Aborting.')
 end
 
 -- Do stuff before actual edits...
@@ -129,8 +143,25 @@ reaper.Main_OnCommand(40289, 0) -- Unselect all items
 reaper.Main_OnCommand(40297, 0) -- Unselect all tracks
 select_src_tracks()
 
--- Set Source Time selection and Copy Items
-reaper.GetSet_LoopTimeRange(true, false, mark_srcin_pos, mark_srcout_pos, false)
+-- Set Source Time selection according to edit mode
+if edit_mode == 1 then -- src-in, src-out and dst-in defined
+    reaper.GetSet_LoopTimeRange(true, false, mark_srcin_pos, mark_srcout_pos, false)
+elseif edit_mode == 2 then -- src-in, src-out and dst-out defined
+    reaper.GetSet_LoopTimeRange(true, false, mark_srcin_pos, mark_srcout_pos, false)
+    mark_dstin_pos = mark_dstout_pos - (mark_srcout_pos - mark_srcin_pos) -- also set dst-in position, so we have a point to paste to
+elseif edit_mode == 3 then -- src-in, dst-in and dst-out defined
+    reaper.GetSet_LoopTimeRange(true, false, mark_srcin_pos, mark_srcin_pos + (mark_dstout_pos - mark_dstin_pos), false)
+elseif edit_mode == 4 then -- src-out, dst-in and dst-out defined
+    reaper.GetSet_LoopTimeRange(true, false, mark_srcout_pos - (mark_dstout_pos - mark_dstin_pos), mark_srcout_pos, false)
+elseif edit_mode == 5 then -- all 4 markers defined, get lenght of shortest region
+    if  (mark_srcout_pos - mark_srcin_pos) < (mark_dstout_pos - mark_dstin_pos) then
+        reaper.GetSet_LoopTimeRange(true, false, mark_srcin_pos, mark_srcout_pos, false)
+    else
+        reaper.GetSet_LoopTimeRange(true, false, mark_srcin_pos, mark_srcin_pos + (mark_dstout_pos - mark_dstin_pos), false)
+    end
+end
+
+-- Copy items
 reaper.Main_OnCommand(40718, 0) -- select items on selected tracks under time selection
 reaper.Main_OnCommand(40060, 0) -- copy selected items under time selection 41383
 
@@ -138,7 +169,24 @@ reaper.Main_OnCommand(40060, 0) -- copy selected items under time selection 4138
 reaper.MoveEditCursor(mark_dstin_pos - reaper.GetCursorPosition(), false)
 select_dst_track_only()
 reaper.Main_OnCommand(40058, 0) -- paste item 
-reaper.SetProjectMarker(mark_dstin_id, false, mark_dstin_pos + (mark_srcout_pos - mark_srcin_pos), 0, 'DST-IN_4Pcut')
+--reaper.Main_OnCommand( reaper.NamedCommandLookup('_SWS_AWPASTE'), 0 ) -- SWS Paste
+-- Move dstin marker according to edit mode
+if edit_mode == 1 then 
+    reaper.SetProjectMarker(mark_dstin_id, false, mark_dstin_pos + (mark_srcout_pos - mark_srcin_pos), 0, 'DST-IN_4Pcut')
+elseif edit_mode == 2 then
+    reaper.SetProjectMarker(mark_dstout_id, false, mark_dstout_pos + (mark_srcout_pos - mark_srcin_pos), 0, 'DST-OUT_4Pcut')
+elseif edit_mode == 3 or edit_mode == 4 then
+    reaper.SetProjectMarker(mark_dstin_id, false, mark_dstin_pos + (mark_dstout_pos - mark_dstin_pos), 0, 'DST-IN_4Pcut')
+    reaper.SetProjectMarker(mark_dstout_id, false, mark_dstout_pos + (mark_dstout_pos - mark_dstin_pos), 0, 'DST-OUT_4Pcut')
+elseif edit_mode == 5 then
+    if  (mark_srcout_pos - mark_srcin_pos) < (mark_dstout_pos - mark_dstin_pos) then
+        reaper.SetProjectMarker(mark_dstin_id, false, mark_dstin_pos + (mark_srcout_pos - mark_srcin_pos), 0, 'DST-IN_4Pcut')
+        reaper.SetProjectMarker(mark_dstout_id, false, mark_dstout_pos + (mark_srcout_pos - mark_srcin_pos), 0, 'DST-OUT_4Pcut')
+    else
+        reaper.SetProjectMarker(mark_dstin_id, false, mark_dstin_pos + (mark_dstout_pos - mark_dstin_pos), 0, 'DST-IN_4Pcut')
+        reaper.SetProjectMarker(mark_dstout_id, false, mark_dstout_pos + (mark_dstout_pos - mark_dstin_pos), 0, 'DST-OUT_4Pcut')
+    end
+end
 
 -- Restore cursor position, time selection, selected tracks, selected items
 reaper.MoveEditCursor(stored_cursorPos - reaper.GetCursorPosition(), false)