If you look at the back of the cab towards the middle then if it's been worked very hard then it will almost appear to be bending.
Good trucks in general and the hydraulic systems a piece of piss to work on,just suffers from water getting on the solenoid plugs that operate the lift,but that's easily enough cured,bit of plate above it to let the water run off.
Worst thing is their very underpowered for what they are but they do seem too lug about most things and at least the lump won't ever break!!!!