Framptons in Shelton Mallet had a fleet of these and got rid due to engine problems and over heating resulting in tow jobs, apparently it depended when the truck was made as not of them had this problem.
In the German factory they did block testing in the manufacturing process and its something to do with that .
Beware of flimsy cab curtain ring holders and put BluTac or Plasticine at the end of the curtain rail to prevent all the curtain running off the end.
Large steering wheel will give you biceps like Popeye .