Planning on using the Hartzell blended airfoil 74" aluminum prop on my -14. However, I would like to consider a composite prop but want to make sure that I don't create a CG problem. Where can can I find the weights of the aluminum Hartzell and the Whirlwind and Hartzell composite props? I'm planning on moving the ELT to just behind the aft baggage bulkhead but not sure how much more I'd have to move (or what) to maintain the same CG. I seriously doubt the ELT move will come close to matching the CG shift caused by the prop change.