Haven't used them but I've got the duck fins from wildhabit.co.nz
They work fairly well with a bit of a current. Have done a test in a faster flowing deep pool and it comes down to rigging them right to make them work more effectively.
Back to the original question. Hunternz is easy to get ahold of and has plenty of videos so just ask him and even if you got 2 to start with that way you haven't invested too much $ and if they work then you know to grab more.
Bookmarks