Just a thought?
Why would you want to cast a dead chicken with a 15' rod?
if that 15' is like there single handers i'd bet it's light and with an ounce of skill from practice should cast a long line all day without beating yourself up..
there are enough skagit rods out there that can cast that chicken...enjoy what the rod was designed for IMHO and you'll love it...
As a side not, the TCX is not like the method or ONE...while some will say and maybe rightfully so the ONE has more feel...I think the method is pretty nice as well and both have a lot more feel then the TCX...
I'm 72, pushing 73, so I may safely assume you are a lot younger than me?

Just needling you, you use the equipment that fits your needs, conditions, and you. I honestly remember when "Self said to Self:" Nine weight rod (and the 10) were more than I could physically handle.
No regrets, just an acknowledgement of 'reality.' Some times I, and Mr. Doggie-Dog on the beach, I haven't even cast. Just watch the water go by. That was enough. Dog was right; toss a tennis ball into the shallows and let him 'fetch' then hoist him back into the Jeep. He's heavier than hell now. Actually he hasn't changed more than pound (per the Vet) but my capabilities have changed.
The regrettable part its obvious Sandy's coming to 'End of Days.' Braking my heart, but he has been my 'Best Friend' for 11 years. There are 'no bad days' with a fur face against your leg. On a river bank, watching TV or in bed. A curl-up and a snuggle, and a sleep. "Snuff-Snort" and a wiggle-squiggle in. You have no more 'problems;' God has handed you the "Answer?"