Really great frame and build. Looks really cool. Not sure Nui-Jaga were Scorpions exactly (Our type of scorpions), but it is your moc. :) The legs and tail are basic yet look soo good. The pincers really look cool and are very creative. To be honest, this reminds me of the Onyx Scorpions from God of War and Clash of the Titans, and for that, I love it ! :D <3 Great moc, been a while since i've seen an awesome rahi.
I don't know what people want for 'custom', but hey, there aren't so many MOCs that use TWO Inika torsos so well! The tail, simple, is pretty beautiful; the legs are better than the Nui-Jaga's (that wasn't difficult but hey =P), the face is pretty cool and well developed... My favourite parts have to be the torso and the pincers, with very intelligent designs. Amazing, Cehk! =)