Joe.. is it a long action? I'm guessing that's probably all Sako made in M-591's. Do you know how heavy it is?
My idea here is to put a light contour barrel on one. Put it in a B&C, McM, or HS stock, Cerekote the thing and have a lightweight LH rifle. I have no clue about building a custom rifle but I wan't to give it a run.