Called Rob and said I had surging on C6Z with BTR cam. He said, no problem, $700. I asked for 1st available opening for 1st thing in the morning. Didnt matter how fay away, I needed 1st morning opening. I arrive on day ( early) and another car is on dyno with tuner. Wait until 11ish and they get car on dyno. Total time spent, including strapping down, 1 hr 15minutes. No difference on surging. I ask Rob to cut me some slack and he says no. $700 cash wasted and better part of the day.