Una Head Attachment

What is the concensus on how to locate a Una sail at the top of its mast.

At the moment I have a 6 mm wooden dowel mast - sorry about that Angus - with a pocket luff sail in florist’s wrapping material and was thinking about a short Aluminium tube sleave with a cap to it such that it would rotate about the dowel.

Do you think the usual double sided Sellotape would suffice to hold the sail to the tube. I haven’t been able to come up with a neat way of folding over the Luff pocket to form a self contained sleeve with no need for the loose tube.