You are treading into the dark waters of the ECU. Roland doesn't like to do tunes for the most part. I, on the other hand think that a MINI with a 15% reduction pulley warrants a new tune to make the most of the
mod. Thus the war begins...
On the tune side, you have a few different styles.
1. There is the canned tune file which is a one file does all like Bluefin. These tunes are ok, but are very conservative with the settings as they don't know what your secific engine is like or what you have done to it.
2. There are the semi tunes like MTH that take your file and match it to many different files giving a bit more aggressive stance over the first. However, they are still conservative as they don't really know what your specific engine is like and only tune by what you tell them is in the car.
3. The custom tune.... This is the tune where the car is put on a Dyno or driven to measure it and then it is manually adjusted to suit what the engine can handle. Roland has started doing this and RMW and P-Torque are also doing this.
Where do you stand? Well, you probably have a tune of some sort and it won't hurt anything but you are probably not seeing the gains out of it like you wanted. Also, expect your MPG to drop, not go up if you are serious about tuning. At first you will see a small increase (I did with the 15%) but that quickly goes away with more power and the likelihood that you will keep your foot on the gas.