Things were coming along nicely when I ran into this....
I went to my local store to find out a torque wrench was $90 (plus tax) so I weighed myself and did this...
I figure 177 lbs. at 10.5" should be just about perfect (assuming it's a linear relation... I forget)
So things are looking pretty good...
Ouch.. O'Reillys and Autozone have them for 20 bucks here.
..., the spring will lose tension and it will lose it's accuracy much more quickly, even on nicer brand-name tools.