What would you say...
 

...is the hardest thing about maintaining & modifying you're FD?

Finding out where an oil leak is coming from?

Why the thing is smoking?

Replacing parts frequently?

Installing parts?

What would you say is you're toughest challenge when working on it.

For me it's installing parts :)

pinpointing problems for me. I still dont know why my car is out of whack, and only doing 3lbs.