Help with Setups?

Hey guys

In the last weeks i started playing ac more and more. I love driving GT3's around the nordschleife and I'm getting to a point where I feel I need a proper setup. Until now the only thing I changed were downforce values but from now on I'd like to get into setups a bit more. Obvously the first idea is to read through everything and then experiment with some settings. There is only one problem with this: On the endurance Version of the nordschleife, I'm driving times around 8.35-8:40 which isnt terrible but also still far away from good. I'm catching every corner a bit different every round and that makes it extremely difficult for me to notice little changes from the setup. If I would be able to drive more consistant it would be way easier, I guess.

The main point of this post is to ask you guys of one of two things: Is there a actual good guide somewhere explaining a little more than just 3 sentences per setup setting or can someone of you who is a quiet good driver share his setup for any gt3 for the nordschleife? Option one would help me a lot of improving my setups and option two would give me the oppotrunity to test out a full functioning setup and compare it to my own. I could for example see that your damper setting is completely different from mine and then think "ah yea he is right that makes way mroe sense", instead of having only mine and arguing about which setting would be better. I would be happy to get some help :)