I am at work, w/ a couple of deadlines blown again so I'm gonna make it short. My last O2 sensor took 3 weekends instead of 1 hour I allocated.

things take longer than you anticipate. Even if you do something you did before.

Sometimes it's enough to drop a 7mm socket on the subframe to push everyting back by 30 minutes (took a small magnet and taped it to my finger to get it out in the end). Yeah it's funny now