Beautiful animal! On my wish list for sure, congrats. What you may want to consider is the DOMINATION METHOD as explained and shown by Justin Kobylka for defensive ball pythons. Holding the animal in your non dominant hand, cover and press down with a cupping form with your dominant hand over the animal's head and body. You don't need to use a lot of pressure at all but just enough to get the animal to withdraw a little. Several motions like this in a session can and will probably help over time. Look at it as a form of quality interaction with the animal that should help with the defensive striking. If the animal is too large for you to reasonably perform this, you may want to work it with a friend or family member using two hands to hold and support the animal. Justin does have a YOUTUBE video showing this with a very defensive ball python hatchling.