Vado Sense SEN-100E/SB-C/P tap query

[ppeetteerr]

hello, Can anyone advise which way round the 'internal guide' should fit as it doesn't show in instructions. The guide has a flat side and a recessed side (see photos) I spoke to Vado customer services but although helpful could only assume flat side down. Any Help please.

 

[rpm]

Does it help if you offer up the base ring, does it sit better one end. Only guessing mind you.

 

[snowhead]

As above, whichever way the base ring makes the guide a tight fit.