billynobites I fastened a straw to the top of a waggler about 1" long, cut a hole in the bottom of the straw, dotted the float down to the tip with the straw above the surface, but the hole sub surface. Just as I remembered & it worked lovely, sounds a lot of fiddling but worth the effort for your mate I'm sure, its very sensitive for the amount of float sticking up.
..Jethro..
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