I am soon going to be rewrapping the handlebars, and while I have the tape off, I may switch from the bar end shifters to downtube shifters. I like the more classic look of the downtube shifters, and my early biking years were all downtube shifting. The set below have been in my Campagnolo spares unused.

Have any of you swapped in this way? Am I making a mistake?

Thanks for your input. Jeff