For some reason, the POH is missing.

Probable got damaged and destroyed many years back.

I am an owner of this plane, and can't figure out the W&B....

Doesn't sound too good does it...:-)

Do you know the actual empty weight and moment? If not, have it weighed
at a qualified FBO. It's not a bad idea anyway; by the time an
airplane gets old enough, it picks up enough hangar crud to make a
significant change in the W&B. Ours did anyway (we had some surprises
when they were reweighed from scratch).

Jose
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