Adjusting to new bindings.
 

I was riding burton custom bindings for like 6 years, then I just bought union force SL bindings yesterday. I put em on my board and changed by back foot angle from 6 to 9. When standing in my board I don't feel as comfortable as I was before. Is there always a period of adjustment to new bindings, or is this mainly because I changed my angle?

Just the angle you will be use to it after a couple runs. I change my setup all the time. Your new binding will definently be more responsive. I had a a pair of last years sl they were nice