Thanks for all the comments guys,
Midmazar & DazAtkinson, I spent about 4 hours test fitting and sanding and massaging the hatch to get it to sit right before I painted the whole thing, and then after painting it was still not right, I'd hate to image how bad it would be if I didnt. I had someone give me advice on another forum, that if you cut the Tabs off that align the body to the chassis the hatch will sit properly, something I will do when I build another.
Thanks again
Ash