I think the plan is fairy solid.
The beer will be a lot more balanced and crisp if you cut the crystal to 8% of your bill. This will still leave you a happy medium of sweetness and body but not overly cloying.
I would also consider working some of the galaxy into the late additions and dry hop. I'm jealous you have home grown galaxy - very cool!
Oh - post results I think a lot of people would like to hear your thoughts on galaxy - not a lot of feedback on it out there.