I thought it was pretty easy thanks to the advice on the forum. Took me about 5-10 minutes to do both. I drilled to Swamp's 5/32" as I also got my markers from JLeviSW. I still had a touch of cracking on one side, likely due to not drilling far enough as I didn't want to drill through. It is quite secure, though.
I'm very happy with the results. Chrome is the enemy.
'11 550i, but it's too big for me
Prev: '08 E92 M3, '04 E46 M3
Completed production: 2015 F80 M3 SO/SO MT, pickup at Welt 7/1/2014