It's funny... You mention the bar-ends are back-to-front.
I've put my bar-ends the same way and, to be honest, they don't really make them any harder to use. Though it may make a bit of a difference for Barakta, you never know?
Maybe try it and see.
Good Luck, and happy triking,
andy
P.S. Don't worry, I realise that cranks as short as 120mm for most people are a step too far, but I really wouldn't want to ride anything long distance without them now.
Though I do also have some 150's on my one and only upright, that I seldom use.