Re: what is the best softest seat?
I have worksman seats on my two Americans and they are wide and comfortable, however I recently rebuilt a 1939 Elgin spring seat and added a gel seat cover under the new elk hide leather. This is even better than the worksman seats. If you rebuild or recover a seat, consider a nice gel seat cover either just as a cover or under the covering. Mine is Bell and was thickest I could find at Wallyworld.
Someday when I grow up I will probably lose interest in toys with wheels, but until then...