Im gonna be modeling a Gargantuan Squiggoth using a Mamuk from
LOTR (it is a rare Long Nosed Squiggoth

)and i was thinking of getting a Great Beast of Gorgoroth for a Big Squiggoth and im wondering if its big enough? I've got 3 types of Squiggoths i've homebrewed and it goes, from smallest to biggest: Squiggoth, Big Squiggoth, Gargantuan Squiggoth. I figure that the Squiggoth would be a bit taller than a Carnifex but a lot longer, the Big Squiggoth to be about the size of a Trukk and the Gargantuan to be the size of its actual model
Note that all size comparisons are without the Howdah.