HELP... I inherited a nice CAV Brand bandsaw from my Father. I was making good use of it until the blade broke. I have been unable to get the new blade on. I got the length recommend in the owner's manual, but it seems about an inch too short. And the tension knob on top will only lower the wheel about 1/4 inch.. I know my Father replaced the blade a couple times, but I don't know his trick to get it on.