Hello Yonny
Sorry I've been tardy with my feedback , but I haven't been fishing as much as I would like lately .
I chose 12lb as the water I'm fishing at the moment , and probably future waters , do not have any Carp heavier than high 20s ; in addition the snags I will be up against ( when they have regrown ) are Lilies , King Cups and Reeds .
So far the 12lb has been more than a match for the remnants of last year's Reeds , and overhanging margin branches .
I have been just fishing the margins , and I think some longer casts and / or a heavier weight ( I use 1/3 oz for my margin rod ) would help the line to settle down on the spool as I have had some " coiling " .