I would just go with the feel of the drill, you will soon find out what is working.
This, hopefully the drill will allow you to ramp up the speed slowly. Do this until you get to a play off between speed of progression through the wall and feeling like you are fighting an anaconda.
This, hopefully the drill will allow you to ramp up the speed slowly. Do this until you get to a play off between speed of progression through the wall and feeling like you are fighting an anaconda.