Maybe issue with Pilot seat
When using mirror mode it doesn't seem possible to place the pilot as the first block in the dead middle of the build with the default designer settings, the mirror line is either left or right of center, but never dead even. This throws off builds if you're looking to place the pilot first and build around from there as all the parts you try to mirror will be offset that bit and may not connect.
Screenshot
[No screenshot provided]
Submitted by: xhyp