I pick left handed with a guitar strung right, left handed with
dulcimers strung left, lefty banjo with my 5-string strung right (5th
string problematic!) ,and left handed mandolin with my mandolin
strung left (would be happy to let you giver a try McGrath!).
I also play drums right but have a dominant left side which I believe
is apparent when I play my hammered dulcimer ( a Dusty Strings model
luckily with base strings on the left). Would give my right arm
to be ambidextrous. Still have been unable to meet a down side up
picker for to compare notes with. Get in touch if you're out
there eh! - and keep pickin!!