From my understanding from my tuner, the "pulling teeth" has nothing to do with the NSX or tuning knowledge in general. It has to do with the way this standalone makes its changes to maps. His understanding of the system, how it works, or it's functionality is not the issue, it is the efficiency which it performs these tasks. When an interface is clunky in it's use, it makes fine tuning like "pulling teeth". This is my understanding of what he has mentioned to me on multiple occasions.