I built this one a while ago as well. One of the best fitting kits I've done. You've done an excellent job on it!
However, I should add a possible correction. There is no definitive proof that Verne was inspired by Winans design. There is more speculation that he was influenced by the work of the French engineer Brutus DeVilleroi, who had actually been a teacher at the school Verne attended. It's even possible that Verne had been a student of DeVilleroi, although there's no historic indication that that was the case. DeVilleroi had been an aggressive proponent of submarines in France and had moved to America where he built several subs, including the first submarine of the United States, the Alligator or as it was originally called, the Submarine Propeller. There's a model of the Alligator at Ecardmodels;
1/48 USS Alligator 1863 by Trent C Henry - ECardmodels.com Shop - Downloadable models and crafts
(I think that's it)
But Winans Cigar Ships are in a class by themselves and really do look like something from a Verne novel! Winans also designed one of my favorite classes of steam locomotive, the Camels for the B&O.
Chris