Do as I say, not as I do. Had a TuneECU cable and modified it by 5000 miles. I didn't get it right until after the first valve adjust.
I have a 2010 990A, G2 throttle, loose valves, 2-1 exhaust, PowerTripp 2-1 tune = very smooth throttle from 2000-6000 rpm, 38-42 mpg, not as fast as an 'R', but on a rocky off-camber hill it will save your ass.
"Dad, can I get a motorcycle when I grow up?"
"Son, you can't do both"