Here is my stab at the scale using Actar's picture (as his Primal was a bit large). In the below picture I scaled Primal on top of the other one so their shoulders, left foot, and head were matched up. I then move the picture over so Cheetor's right foot is lined back up with Blackarachnia's left foot: To me it looks like Cheetor will be JUST a bit taller, mainly due to his helmet. Cheetor is also posed more upright though. I am still fine with this but it does appear that Blackarachnia will be a bit too tall... of course I could be way off.