Lower the arms as much as possible first thing,then turn the arms so the arrows sits as far down in the arms as possible without falling through,that should get you really close to center of the hole.I was able to get mine through the center of the berger hole on my Hoyt without any trouble at all.Also use moleskin instead of the supplied prong covers and that will save some height as well.
Bowtech puts the hole lower than other manufactuers so if you are across the hole,you are probably about the same as most other bows on the market.
I can shoot 4 fletch vanes with the fletching turned so they would slam the rest if it didn't drop soon enough and I get no contact.
I measure 1 1/4" from the cable slide and that is where I serve in.
Here are some pics.
This is how I serve mine in.This one is actually an 07 model which I like better than the 08's but I have no issues on either bow with either model.
Paper tune with 3 feathers and 4 plastic fletch.
2 arrows shot at 23 yards.