Above is the first batch of tentacles, and most of them ended up rather thick. So I worked out a second set (below) after the first had cured. Which turned out better, I tried twisting a couple together in this batch trying to figure out how to pose the tentacles while the greenstuff is still uncured. I'm sure a few cycles down the road I'll actually start being happy with them.
I have a couple Slaanesh project ideas currently, to use tentacles in, so i figure many will get used anyway. I'll probably end up placing these and making more to mount while still uncured to make them look like they fit better together.