Barlow 32 self tailing winches or not

On my Barlows (not sure without checking but I think they are 40s) there is a spacer which can be removed/repositioned to adjust for different sheet size.
FWIW I use 14mm braid-on-braid.
Thanks Vic. I tried 12mm, 16mm and 18mm. Didn't get much success. Will try 14mm and strip the top of winches to see if mine have a spacer
 
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