Well 19 mph and anything less than 450 revs is pretty much speed dominant...
I'd figure unless you have a very Mike Fagan-esque swing, you are still muscling the ball to get it to 19 mph. I understand if you're more comfortable, but if your game is already in flux, I'd recommend trying to get a better ball reaction using your physical game rather than redrilling equipment. There are a couple of things you could do to try and maintain a loose relaxed armswing while keeping your speed slower - try moving your feet forward 4-8 inches to start your approach and start the ball 3-6 inches lower in your stance. Try to keep the same rhythm as you had before, but limit your backswing....let it get only to where gravity takes it, dont use muscles to pull it up to compensate for the lower starting position. Taking smaller steps and shrinking your swing should slow you down while allowing you to stay loose.
If you have to be really precise its because your ball reaction isnt matching up to the forgiveness in your house shot. Perhaps you need to play in a different zone of the lane. Maybe try 2-4 boards farther right at the arrows and 3-7 boards farther right with your feet.
Using your equipment, you could first try surface adjustments to get the ball to pick up earlier, if your surfaces are shiny, try taking them to 2000, then 1000 if needed, perhaps even 500.
There are things you can do with drilling, but if playing a different part of the lane and using different surfaces doesn't do the trick, I dont think drilling will either.
