underwater tripod - gorilla pod size

Im looking to add a gorilla pod to  my underwater kit (Olympus EPL10 and Backscatter MF1 strobes). I am wondering what size gorilla pod you guys use? The Gorilla pod comes in a 1kg, 3kg , and a 5kg weight limit. I am thinking about getting the 3kg just incase I decide to use it above water, what do you guys think?

I had this discussion a while back: 

View archived post in: Anyone using a JOBY Gorilla Pod?

TLDR; if going gorillapod, get the plastic ones, the rubber compound is better and more durable than the aluminum gorillapod. But I think the strobe arms attached to the bottom of the tray as tripod legs are a better solution, more durable, easier to maintain. Weight limit isn't a big issue underwater due to buoyancy.

I think the 3kg gorilla pod has a plastic version (non-Pro model) go with that one.