Kevinski, Balance is not your only concern here. You have to be darn shure that tall adjusting nut you are using is perfectly perpendicular to the fan base you riveted to and also it has to be perfectly centered. If those conditions are not met, the fan will wobble and you will ruin the motor in short order. If it were me, I would look under a lot of rocks to find a usable fan. If you find one, then your only worry is balance with the weight. The weight alone cannot compensate for the first two concerns. I am sure if you post in the parts wanted section I would, ooops, strike that, somebody would reply that has an extra fan blade they would part with
