Using If to prevent a table displaying

I have come up with this.  It seesm to work but doesn't auto refresh.  

Any ideas of a better way to do this?

let
Source = Excel.CurrentWorkbook(){[Name="Cum_Total"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"UPN", type text}, {"Block", Int64.Type}, {"PP", type text}, {"Year", type text}, {"Count", Int64.Type}}),
#"Removed Rows" = Table.Skip(#"Changed Type", each ([Block] = 1 or [Block] = 2 or [Block] = 3 or [Block] = 4 or [Block] = 5)),
#"Filtered Rows" = Table.SelectRows(#"Removed Rows", each ([Block] = 1 or [Block] = 2 or [Block] = 3 or [Block] = 4 or [Block] = 5 or [Block] = 6)),
#"Grouped Rows" = Table.Group(#"Filtered Rows", {"UPN", "PP", "Year"}, {{"Count", each List.Sum([Count]), type number}})

in
#"Grouped Rows"

Thanks