Grammer Ann-
It is not worth doing cross-hatching by hand. I am sure your hand-quilted center is lovely but be rational about the borders. In cross-hatching, uniform stitch size is probably more important so go for it with machine-quilting and save your hand-quilting for feathers and stars,etc.
Besides quilting is supposed to be fun and it doesn't sound like you are having fun.
Finish your quilt by machine and start your next project with fresh enthusiasm.
-Judy