That's the way to do it absolutely.
In my centers run by same proprietor right now par for lefties is about 175, par for righties is 208.
They are currently dead in handi tournaments if I or any of the other decent lefties enter if shot is anywhere near equalized.
Of course I know a center nearby where par for lefties is 211 and righties is 201.
REgards,
Luckylefty