The suspension is EXACTLY the same!
I found that with a mod (found on these boards) and some proper lubrication, they actually work okay. And the tank sits higher and looks more right. I did the mod for my other 3 Pz-IV's (well, one is a Stug, but same lower)
The tubing is the same as with all their 360 models, but I havent found that to be a problem yet(my tiger and T-34 a about 2 years old now). My biggest problem with these tiny wires, is when I need to disconnect the plug from the board, they can easily snap!
On another note, one of the drive sprockets came loose, and I thought I wanted to check if there were room for the shaft supports I got. In short. There is not! Taigen made sure that it wouldn't be an easy fix, to make your drive shaft more sturdy...
It seems, that the entire lower hull, is one complete cast, with only a few small details in plastic.