DAX RANKX Top N values by slicer error

[Dicken]

Workbook attached.
Hi,
I have ranked some figures and then used an IF statement to bring back the top 3 ,

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I then used a selected value TopN = 1,2,3,4 ;

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and then used this as the criteria for an if statnement,

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,

this works fine if I have selected a value from the slicer, but if I have not selected anything
I would like all the values to show, which is why I used [Tunits] for the false resut in oneV measure.
The problem is the bottom 4 values do not show if no selection is made?