Za, I am not understanding your question. Are you wanting sources for the last line of the inside quote of tik's post or the last line of his post?

In Tigers in the Mud, by Otto Carius, 1992, pg 207, the author speaks of having to lock the barrel of the gun and the difficulties associated with both removing it and not using it. On page 208, he complained that even the least bit of off road travel left the gun out of sync with the sights. He also belabored the maneuverability of the machine, saying "it left a lot to be desired." Finally, he said that because any large traversing of the gun required moving the entire machine, "transmissions and steering differentials were soon out of order." Is this what you were inquiring about or am I shooting blanks?

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Best Regards,
JW