I've had two pro systems. The first was so bad I returned it to Patric & after checking he admitted they had missed the program & sent me a totally different & larger carb.
2nd. carb ran great when accelerating really sucked on cruise. I have spent many hours modifying the circuits & now have it I believe, as good as it can be.
When I called Patric on the second carb & even offered to pay for another not expecting anything for free, I was told that was all they had ( program wise ) & I was on my own.
This is not meant as criticism of pro systems, more as information that not all their carbs are as advertised "bolt on & go"
Craig