As far as case cutting goes, I used various Dremel tools to cut mine, but it wasn't pretty. I initially cut to the exact lines that the template had, but after using a hobby knife to clean up the edges, the holes were considerably bigger than they should have been.
If I were to do it again, I would use the Dremel to get about 1/8 or more away from where I want the end result to be, then use the hobby knife to finish the holes to get a perfect fit.
My battery terminals do seem to be press fit, they kind of "latch" in.