You can definitely pull off cross harp for a minor key, but you have to
put a little bit more thought into it. Just playing your standard cross
harp blues licks will sound janky if you aren't careful to hit that flat
three consistently, instead of that major/minor "blues third."
SNIP
how about just stickin with 2nd position on an F harp. you can use lo lo
F, lo F, and regular old F.
I am sure there's lots of decent choices though. If it's more of a BLUES
groove - I would likely go with that... especially those two chord
grooves that let you run in some interesting directions.