I knew it added some height but I wasn't sure how much so thanks for the info
I've seen some criticism elsewhere that certain elements of the vehicle modes could be better....the exposed fists on Scavenger and what appears to be the arms in the truck bed on Long Haul but I think that compromises inevitably had to be made to keep the costs down as much as possible and TFC probably figured that most people will display their Constructicons as 6 individual robots or as Devastator so the vehicle modes suffered slightly as a result.
For me it's an acceptable trade off when you consider the scale of each 'bot and also that TFC are a small group with limited resources....the more complex a design, the more molds have to be made for all the different parts which would eat away their budget pretty quickly.
That they've done such a great job in capturing the G1 aesthetic whilst adding modern articulation and largely self integrated parts for the limbs is quite an achievement and once complete I think it'll be one of the landmark 3rd party releases in much the same way City Commander was.