I have an old split cane Mark 4 carp rod with a TCF of (i think) 1.5 pounds dating from the early 60’s and had several carp over the years of 20 pounds +on it. Mind you, I’ve had some funny looks from the bivvy boys when using it, one (very kind and thoughtful) young guy came up to me and said “don’t take offence mate, but I know how tough it is for pensioners and I’ve got an old Fox rod you are welcome to if you want it”. Bless!