Thanks for the feedback guys.
Yeah, I know on the '08+ WRX/STI you have to remove the TMIC to reach the grommet due to the location of the grommet and the redesign of the TMIC. I am still hoping this isn't the case for my year but I guess I'll just plan on removing the TMIC unless I see tonight that the grommet is manageable without removing it.
Good idea with the hairspray. I'll do that when re installing for sure. And the BPV gasket is only 4 months old so it should be alright. I'll definitely inspect it before re installing though.