About UK carp tackles...

[casting]

I would like to ask a variety of questions.
It is a Korean angler who first encountered UK fishing tackles.
Carp fishing in Korea, watching UK rod pot, bite alarm on YouTube.
I made an order right away.

List of products I purchased.

fox micron rx+ 4 rod presentation set
fox horizon duo 4 gen
fox euro mk2 illuminated swinger
fox large but grip 4
guru reaper 4

I want to buy one more set

fox rx+ 4 rod set vs delkim txi plus set
fox horizon duo vs Cygnet grand sniper extreme pod

What do you recommend?

My rod is Daiwa land surf 27-450,
Butt rest does not seem to fit well.
I want a more tight grip.
Do you have any products that you would recommend?
I apologize,my English is not good.
I would appreciate your explanation in easy words.
Have a nice day!!

ps.There was one thing that was interesting to see British fishing.
The British measure the weight of a carp,
In Korea, we measure length unconditionally.