i ve got a downpipe on the way, and im wondering what changed can be made to my tune now.
just to BTS and thats it? or are there any other benefits of the downpipe? more boost?

thanks

cat delete is 1 byte.

not any harder than me7.

Why would you touch BTS?

dang, i was hoping yours was 115b or h! that would have been easy! oh well, ill just have to figure  it out.

I do not think you understand in the slightest what BTS is there for.
It is component protection. It works by adding fuel to cool down the combustion temperature.

You have removed the CAT, but removing BTS and relying only on ATR (if ATR is even active) will result in cracked exhaust manifolds and failed turbos.

I think you should better educate yourself on the function of the internal combustion engine, so that you can make informed decisions and understand what every module is there for.
Even reading Funktionsrahmen about this function tells a great deal as to why it is there.

Why do you think that your EGT magically fell by 200 degrees after removing the CAT?

I don't see how LAMFA is sufficient when you are not driving at WOT all the time.
You do realize if you try to do lambda 1 on part throttle all the time, you are easily going to hit EGT limits?

I don't really understand the question...? Just fit an EGT probe in your turbine housing (right after the exhaust manifold, entering the turbine) and see what you make of it.
If you can see that (using either logging of fuel or using a wide band lambda sensor) the car starts to heavily ad fuel before it even starts to get warm, then it's time to adjust.