We have some new insights on Don Rosa (the famous Duck comic book artist) involvement with TaleSpin.

Here's a modelsheet he did for the episode "I Only Have Ice For You" : (click to enlarge)

Also, a quote from the Don Rosa Collection book set :

"'TaleSpin' was an interesting show -- it was based on old adventure movies of the 1930’s which was certainly one of my interests! I soon was getting enthusiastic about giving it my best shot. I even did storyboards for my own scripts for free, trying to make myself valuable. A screenwriter who can also do his own storyboards was just as rare as a comic writer who can draw his own scripts. It turned out that I wrote the first two episodes of the show that were animated in Korea or France (Disney no longer did their own animation), though they were not the first episodes broadcast. The two episodes were 'It Came from Beneath the Seaduck' (a parody of 1950’s giant-monster movies), and 'I Only Have Ice for You' (they liked puns as story titles). I recall that the first script was animated almost exactly the way I wrote it, while the second one was altered totally. But the producers were very gracious; I had written that second script based on the story synopsis they had given me, and they later said that they needed to see that synopsis in script form to realize that it would not work, so I still received full pay and a good review."