The star pattern part is right but the whole thing about impact guns stretching studs is a bit off. What actually happens is the gun over torques them, and yeah it can stretch the stud, but the bigger issue is people zip them on uneven and warp the rotor or the wheel face. A torque wrench is the move, no question there. For a half ton most are 140 to 150 ft lbs, check your manual because it varies by year and axle. My 2016 is 150 and my buddy's older Chevy is 140.

Heard a chimney guy on a podcast say he always eats the cost when he misses something, says it builds trust and word of mouth beats the $850 anyway. Tell her straight that you found the crack on the second look and you'll fix what you missed for free.

Bought a used stand off Craigslist for $80 and spent two hours cleaning rust off it.