That was my plan too. Put it in the car and got it running...with a91what doing most of the tuning. ( well...all of it ). Been about 2 years now.
The only other thing the kit needs is a hanger on the down pipe. I've got the on3 Y pipe and the weight of the exhaust sitting on the turbo doesnt sit well with me. Haven't had issues with that either but would help to add some support.
Also, I got the down pipe sock and turbo blanket from on3 as well. Worth every penny. My headers and crossover aren't wrapped. Had to put heat shields on plug wires, rack boot on drivers side, rerouted power steering lines, and ac lines. The hose by the passenger strut tower runs close to the turbo. I plan on rerouting that in the near future.