Such an interesting model to put together. After a few years of building AFVs, to suddenly be confronted by a plethora of writhing tentacles, it was a bit different, to say the least.
But nicely the reaper kits all seem to be constructed so that each part has a differently shaped lug to go into a specific socket. You can jam or wedge tentacles into the wrong hole if you want, I suppose.
It does need and will, before painting, get LGS around the gaps. If you click on the pics (stealing Inso's phrase) you can see that a lot of the surface detail is eyes. Nice. I've just seen Lord Halfpenny's plague toads, so that looks like it could be a way to go for the painting. PVP's advice for animals is to always use real world examples, but erm, this doesn't really look like a cow. Or Crocodile or anything else for that matter.
With the tank for scale. It's certainly big enough.