Glad that you like what you have done so far LBVSVT!! Drill out the brass holes even more or completely out. Leave your car in the "on" position as you are setting it... you can watch the voltage on your meter as you move it around to set it... that makes it easier... when you are done setting it and tighten the screws down, flip the throttle plate a couple of times to make sure that it returns where you origionaly set it at. You won't do anything bad by reading the voltage while the car is on (not running) and moving the throttle plate... don't worry. Glad that you like it so far... I am going to do mine today, I have made time.
Along with me doing this mod, I am going to also make another TH fix piece for the summer since mine seems not to work nearly as well as it did in the winter. I am going to make another one with a slightly smaller hole.