I was interested by the comments from eyu and Richard (the trickster) not the Stix floats.
I bought my Stix floats off a colleague of Ryan's when he visited KBR in 2010 - so then they were second hand. I must have done about 700-800 dives with them and haven't seen signs of post-dive compression or lack of buoyancy. Maybe I've just been lucky with them. They have probably never been below 32m but they are often in the 25m-30m range.
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