Hi Graham
I have done similar kits and the gaps where the neck fits to the body usually need a little finesse, yours is not a bad one.
Trevor has already posted a very good pic of how to mock up inserting the bridge posts for a TOM (tune o matic) type bridge ( go to #7) https://www.buildyourownguitar.com.a...ad.php?t=12645
If you move this to a new thread in the Build Diary section more people will see it and help where needed.