Jereme - If you have all of the loops removed you're likely in the 55-60' range which is where I used to ride behind a 17.5' I/O. 20 mph is an alright speed for that line length, you could try to increase your speed to 21-22 to see if that makes a difference.
As noted above you really want to focus on a progressive edge (counting is good advice). There's a tendency to cut too hard and flatten off. If you were to measure your speed/force it would look like this (on a scale of 1-10 with 10 being the fastest) 1-4-8-10-8-6-air. If you find yourself pulling forward it's a good indication of flattening off.
Other things to focus on is your grip, handle position, stance, foot weighting:
Grip - both palms down
Handle vertical position - around your belt line/navel (handle should stay in this area of the body)
Stance - hips forward, shoulders back - it's important to keep your hips forward and not to break at your hip (don't stick your bum out)
Feet - shoulderish width apart, mounted similar to how your feet are on ground (slight angle outward), with approximately 60% of your weight on your rear foot
See this video for an example of what I consider a good stance
https://www.youtube.com/watch?v=D2DyJI16n88