I just updated my '17 to a new '18. The '18 pulls 2 grams more weight than my '17 and holds RPM at 10,000 much better than my '17. I'm able to run 10-64's at 10,000 pulling 8,150 R's. I haven't had a chance to test in warm air yet, that's where my '17 would fall on it's face. Very happy so far, you can probably get into an '18 for less than $10,000. I don't know if they changed the mapping but overall I'm very happy so far. May just be getting a leaner burn on account of the 95 degree jacket temp.