No to the tower reinforcement.
Bad, with Reps, you should have a less aggressive offset than OEM so it's not really necessary but most decent coil overs come with them so make use to get a good road setup.
Like I said, its not complicated but a good alignment centre that has experience with fast road and track cars will make the most out of it.
I run a modified version of Z4M and CSL setups with minimal camber upfront and 2 degrees rear.
Handles like a dream and not excessive on tyre wear