Yes, I have dyno with AFR close to my location.
I'm using tune from TSS and it works fine, but two weeks ago some tuner from here after just seeing/smelling exhaust gases said that afr is too rich. So probably it is not perfect.
I haven't changed anything important since then, but now I'm going to ...

It is really hard to find any tuner, who will prepare Predator custom tune for supercharged 01 Cobra :/

Yes, I do have software and cable for Predator (I'm using custom tune from TSS approximately for a year).

I have a dyno with AFR half a mile from home.

As I know, I cannot connect any AFR ...

Yes, I'm in Poland. My supercharger is taking air trip now (road trip is not possible :)
Problem is that, there is absolutely nobody in Poland who is doing custom tunes for IV gen Ford Mustang. There is one guy, but he customs V gen only on SCT. I've talked with him and he can order email custom ...

I bought supercharger form Mustang Cobra 03 for my Cobra 01.
Can I stay with diablo predator U7146 or do I need U7142?
Where can I find a list of Tuners whose may prepare proper custom tune for me via email?