I can't rememebr if it was the 250 or 260 we used to fly but here are the figures for our aircraft (c/n 24-1094)
-----------Weight------Arm------Moment
APS-------1784--------83.8-----149464
Oil----------22.5-------28.0--------630
Row 1------xxxx--------84.4------xxxxx
Row 2------xxxx-------118.5------xxxxx
Fuel--------xxxx-------90.0-------xxxxx
I still have the Owner Handbook and the Weight and Balance schedule but not the weight calculator (can't recall seeing one either).
JB