After over a year, I'm able to enjoy my Duo-Art, but I'm still
fine-tuning a few items.  It occurred to me that according to the
schematic, both the repeat and rewind pneumatics are operated by
holes on the extremes of the tracker bar -- thus if we want to
repeat the roll, they will be fighting against each other.

Can someone please explain to me what I'm missing there?

Thanks,
Eli
Eliyahu Shahar