That`s my new mission maybe. I have Bob Meiser`s "Troutmaster Combo" which is a 9`3"6 wt. single handed rod that converts toa 12`6" Spey 5-6 wt. So,what happens if I attept to use this common butt... [there are 5 pieces-the Spey 4,ther single uses 3,they share the butt] for 4 wt.? Will this butt be to heavy? Is this a deal breaker? What do you think?