I'm surprised a shop owner hasn't chimed in. I'm not, but I have pressed several bows. I have a Bowtech General '08. Not sure the brand of my press.

I have never loosened the limb bolts when pressing.

My press came with u-shaped pins designed for use with split limb bows. The key is to get them lined up near the pulleys without touching them, but not on the end of the limbs.

Go slow, watch, and listen as you increase the pressure. Only go as far as needed. You should be fine.

If you're in doubt contact the press manufacturer, Bowtech, or both. You'll get the correct answers from them.