The sole constant I've got is F4. No point in anything else for me.
Funny you say that, because I guess that could also be the same for me, with all the things I have been trying, but maybe to add to that, the stability of my setups mean that I tweak and modify anything and everything to make them feel the way I like my setups to feel.
I could be on Indy, Thunder, Venture or even a few other trucks, but I would do things to them, or to the board to have them all sit about the same height, all turn about the same amount when I am on the board, change wheelbases by redrilling the truck baseplates or the decks, modify the bushings, cut down kingpins, etc.
Decks always BBS or at the very least "BBS like concave" such as the DLX China boards, usually DLX boards anyway, but not limited to just DLX brands.
Wheels yes always Spitfire wheels, almost all Formula Four, almost all wider worn down wheels I have reshaped to be fat / wider profile but rounder edged closer to the ground, mostly now between 50 and 54 mm but started closer to 54 to 58 mm from new.
I had just been on Indy standards for a good while, usually on the 8.38 or 8.5 decks, everything else pretty much the same, still could I guess, but having a set of T-II opened my eyes to having the trucks drilled in just that little bit more, so I have been doing that to other trucks now as well.
Maybe this should just be moved to the Madness thread, because it would probably be making others heads hurt, but everything works nicely on my setups and I know now exactly how to get to where I want to be, only taken 40 years to get here though.