If the preview in Aspire is correct, then there's a 99.99% chance that the g-code is correct.
I'm an Aspire beta tester, since the very first version, and have never seen an issue where the g-code is wrong, if the preview is correct. Unless you use the wrong post processor.
I can't count the number of times where someone was sure everything was tight, only to find a loose screw after checking a few more times.