Append multiple CSV from SharePointFolder and transform table

Hi Guys

I am trying to append dynamicly some CSV-Files from a SharePointFolder. Means, whenever a new file is being saved in this sharepoint folder, I want to have the new data.

I already can get all the files from the folder. Now I just have to transform and combine the data.  

I am struggeling with the final steps in transforming: Since it is a CSV, i need to split the data, remove first row and set the (now new row) as header.  Maybe you guys can help me.

Get the CSV's from a SharePointFolder

let
    Source = SharePoint.Files("sharepoint-address", [ApiVersion = 15]),
    #"Filtered Rows" = Table.SelectRows(Source, each Text.StartsWith([Folder Path], "sharepoint-path")),
    #"FilteredContent" = List.Transform(#"Filtered Rows"[Content], each Transform(_)),
    #"Result" = Table.Combine(#"FilteredContent")
in
    #"Result"

Function "Transform"

let
    Source = (input) => Table.FromColumns({Lines.FromBinary(input)}),
    #"Split Column by Delimiter" = Table.SplitColumn(Source, "Column1", Splitter.SplitTextByDelimiter(";", QuoteStyle.Csv), {"Column1.1", "Column1.2", "Column1.3", "Column1.4", "Column1.5", "Column1.6", "Column1.7", "Column1.8", "Column1.9", "Column1.10", "Column1.11"}),
    #"Changed Type" = Table.TransformColumnTypes(#"Split Column by Delimiter",{{"Column1.1", type text}, {"Column1.2", type text}, {"Column1.3", type text}, {"Column1.4", type text}, {"Column1.5", type text}, {"Column1.6", type text}, {"Column1.7", type text}, {"Column1.8", type text}, {"Column1.9", type text}, {"Column1.10", type text}, {"Column1.11", type text}}),
    #"Removed Top Rows" = Table.Skip(#"Changed Type",1),
    #"Promoted Headers" = Table.PromoteHeaders(#"Removed Top Rows", [PromoteAllScalars=true]),
    #"Changed Type1" = Table.TransformColumnTypes(#"Promoted Headers",{{"K", type text}, {"P", Int64.Type}, {"Time", type datetime}, {"Desc", type text}, {"A", type text}, {"B", type text}, {"C", type text}, {"D", type text}, {"Value", type text}, {"User", type text}, {"Q", type text}})
in
    Source

I do get a result, but the final steps (split, header row,...) are not applied. What am I doing wrong?

Best

Aleks