I can remember in my early days of bow hunting thinings how some heads just "flew bad". What I later learned was you have to tune your bow properly. I took up bow hunting and didnt really have anyone to show me the right way but I learned as I went. My first bow shot on a doe was looking straight at me and I hit her at the base of the neck. I didnt know better.
What Im getting at is many of us went down the same road and there is much to learn. Tuning a broadhead is part of it. Using a mechanical to get better flight isn't the answer because you will still be losing a lot of energy from an out of tune arrow.
There are good tuning guides on the web here is a great one...
http://www.eastonarchery.com/pdf/tuning_guide.pdf
Don't take shortcuts and find time to practice and tune your equipment. We owe it to the animals we hunt.