Thinking of doing using uniconnect myself and swapping between stage1/2 files.. Asking them now.My local TVS dealer told me the same yesterday
I will get TVS instead of UNI because custom tune is preferred to me as I have special request of 2500RPM gear change on D mode. Also, UNI does not have good support here in my country so I don't want to check with local dealer on my TCU software. You can go with UNI if your local UNI dealer has good support and the TCU file you want. I believe it will work just fine.
I believe there are many who can do that with turbo upgrade. The 5 cylinders engine is just too brilliant, with stage 2 engine software & hardware you can have almost 600HP if you have acess of E85 fueling available in your area. Currently mine is around 550WHP (98RON without meth) according to the experience of my DS1 tuner but I will dyno my car just to prove after my meth setup done. Hopefully we can see close to 600WHP, which is my final goal