Is there anything on record claiming that the Bundesbank tried to withdraw more than 300 tons but was denied (besides the speculations)? Officially, they wante

Is there anything on record claiming that the Bundesbank tried to withdraw more than 300 tons but was denied (besides the speculations)? Officially, they wanted to rebalance some of their holdings. The original plan was to remove 150 tons in 3 years, but due to undisclosed issues, that became a 300 tons withdrawal in 7 years, which was achieved three years ahead of schedule. I'm also wondering why all those articles assume that moving tons of gold is trivial, is there any description at what is involved in X tons of gold transportation (insurance / planning / protection / etc.).