I recently bought an Orvis Bamboo Battenkill 7ft, 2 pc Fly Rod that was built back in 1970, see 1st pic. I was thinking about having this rod converted so that I can have the option to add an extension, similar to what's in the 2nd pic. I was thinking of tapping the exist butt to accept a threaded plug that could be removed to accept a threaded extension. Does anyone knows of anyone in the Detroit area that may be able to do this kind of work. I'm just looking to get some idea of costs, might be better to just leave it as is..