This submission can be considered as an accomplished TAS. I will not publish any improvement soon (although there is room for improvement, "bad ending" runs are pretty recent and the search for an optimal route is not over).
I published two runs of the "bad ending" run within a short time because of a small error in my first publication : I swapped two movie files because of similar names and improper indexing on my HDD.
I asked advice from CoolHandMike about how to handle my error. I submitted my 7:55 run thinking it was my recent 7:47 run, he told me to change only the description in the submission, in order to be consistent with the movie.
I am new in submitting TAS', so an error is always possible ! That's why I submitted twice in a row.
I didn't change the file name because at first I did try LOTAD runs of DuckTales. In the end it was not far from being optimized as for TAS standards, and this run can be considered as a real TAS. But as said in my submission there is still room for optimizations like most TAS published here.