I am looking for a light weight over under for my hunting companion, who is a new shooter (last was her first season hunting/shooting.)

She is 5' 1" on a good day, with proportionately short arms and tiny hands. I bought her a CZ 'Youth Model' (named after some duck species or other, made in Turkoslovakia) 20 ga o/u with single trigger, 13" LOP, and 24" bbls. I thought it would be perfect, but it's unnecessarily heavy for those dimensions (nearly 7 lbs!) and graceful as a fence post. To my friend's credit, she managed to slay some birds with it last year, but it's painful to watch her heave the gun to her shoulder and manoeuvre her hand into position to where she can reach the trigger. Any recommendations for a lightweight double (20 or maybe 16) of suitable proportions? I'm not interested in autoloaders or pumps, because I won't hunt with someone who can't break a gun open. A sxs might work, but I suspect she'd do better with an o/u with single trigger.

Thanks!