[Davie Boy]

Ok, so I have more information. I was finally able to put a good amount of miles on the car and get a better feel for what's going on. The vibration is most intense in 1st and 2nd gear, and at higher RPMs. While still noticeable, it's not as bad in higher gears, even at higher RPMs. I also noticed that after the car gets warmed up and has been driven a few miles, the vibration overall diminishes somewhat. It's definitely still noticeable, but it's not as intense. Does this still sound like a balancer shaft issue?