Originally Posted by Bob-Stormer

Explanation is fine.

Practicing with insanity makes the motors with less power seem easier to drive. The real key word is practice. track time is track time. Even as a newer driver, you will turn faster laps with the slower motor.

The ability to hold a line will happen in 17.5. The ability to come close to that 17.5 line is what you'll get with the 13.5. Don't turn anything down on the 13.5 and have some fun. I'd consider a 10.5 though. If you're gonna commit, commit!!!

A suspension arm is like $5 and the story about how you nailed the inside wall at 40mph and the car flipped 30 feet in the air and landed in the popcorn machine at the snack bar is worth about $127 (on the "what's a good story worth" value sheet). Pretty good deal, really.