[niterydr]

The majority of the popular tuning systems. EMS, Emanage, S-afc, gm maf-t setups, dsmlink, eprom ecu tuning and chip burning, split second, DIY wideband stuff, Z-Tronix wideband stuff, innovative wideband stuff.
Its more of knowing the vehicles, and knowing how to manipulate the software properly.
Each manufacture, and more importantly each CAR wants different amounts of timing, fuel, boost. We are going to classes to make sure we know what we think we know (never hurts to learn). Then it is a learning curve, like John mentioned.
We will never claim to be the "experts" on any tuning software, piggyback, or standalone ecu, because as we haven't invented it, and tuned every car available for it, on every possible setup, you can't be the expert.