Great mod, I'm using it all over my factory. On our server we found a small issue with single splitter on other surfaces, for example in factorissimo factories. Here is the fix we use on the server and it seems to work fine:

[diff for mods/Single-Splitter_0.0.10/control.lua]

@@ -27,7 +27,7 @@ function OnPlayerRotatedEntity(_Event)
if IsSingleSplitter(_Event.entity) then
local _Splitter = _Event.entity
for key,value in pairs(global.SingleSplitter) do
- if value.pos.x == _Splitter.position.x and value.pos.y == _Splitter.position.y then
+ if value.pos.x == _Splitter.position.x and value.pos.y == _Splitter.position.y and _Splitter.surface == (value.surface or game.surfaces[1]) then
value.dir = _Splitter.direction
value.cachedInBelt = nil
value.cachedOutBelt = nil
@@ -71,7 +71,8 @@ function GetSplitterInBelt(Splitter)
inBelt = nil

• local belt = game.surfaces[1].find_entities_filtered({ type="transport-belt", area = scanArea})
• local _surface = Splitter.surface or game.surfaces[1]

• local belt = _surface.find_entities_filtered({ type="transport-belt", area = scanArea})
  if belt[1] ~= nil and belt[1].direction == Splitter.dir then
  inBelt = belt[1]
  Splitter.cachedInBelt = inBelt
  @@ -89,7 +90,8 @@ function GetSplitterOutBelt(Splitter)
  local facing_directions = {[north] = south, [east] = west, [south] = north, [west] = east}
  local scanArea = GetScanArea(facing_directions[Splitter.dir], Splitter.pos)

• local belt = game.surfaces[1].find_entities_filtered({ type="transport-belt", area = scanArea})

• local _surface = Splitter.surface or game.surfaces[1]
• local belt = _surface.find_entities_filtered({ type="transport-belt", area = scanArea})
  if belt[1] ~= nil and belt[1].direction == Splitter.dir then
  outBelt = belt[1]
  Splitter.cachedOutBelt = outBelt
  @@ -186,14 +188,15 @@ end
  function AddSingleSplitter(_Splitter)
  local _Position = _Splitter.position
  local _Direction = _Splitter.direction

• local _Surface = _Splitter.surface

• local set = {pos = _Position, dir = _Direction, lastInSide = 1, lastOut = {1,2} }

• local set = {pos = _Position, dir = _Direction, lastInSide = 1, lastOut = {1,2}, surface = _Surface }
  AddSet(set)
  end

function RemoveSingleSplitter(_Splitter)
for key,value in pairs(global.SingleSplitter) do
- if value.pos.x == _Splitter.position.x and value.pos.y == _Splitter.position.y then
+ if value.pos.x == _Splitter.position.x and value.pos.y == _Splitter.position.y and _Splitter.surface == (value.surface or game.surfaces[1]) then
table.remove(global.SingleSplitter, key)
break
end

For someone who has no experience with LUA, what do I have to do with this wall of nonsense to fix this problem? Thanks

Fixed with 0.0.12