[Paddlewise] seat and sore backs

I have a Chesapeake 16 which I really like and am building a Guillemot
which I hope to complete this spring. I got the seat for the Chesapeake
from a friend who manufactures kayaks and has a seat mold. I like the
seat because it has a back attached and the back's tilt can be changed,
but I have found that if I use this seat several days in a row or really
put on the mileage, my lower back gets sore. This is not a problem I
usually have. I will need a new seat for my new boat. Does anyone who
has back problems have a seat that works for them and could pass on
suggestions?

Thanks, John
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