See page 21 of the instruction manual: http://manuals.hobbico.com/hca/hcaa17-manual.pdf

The "Limiter" can actually be removed, it has been several years since I had my Nexstar, but the first thing my instructor
did was remove the limiter & assist link, as he said it was only used for those trying to learn without an instructor, linked via buddy box.
However, the leading edge slats where a great help, but we removed them after approximately 4 flight sessions.