My family got me a PS300 for Christmas....which is the one I wanted and not the Carvex....I can't justify it in my situation right now. Anyways she got me a couple accessories for it and one is the parallel guide. When this is riding against the side of the board how is the cut quality strictly in terms of straightness. Are the cuts "straight" and afterwards have to be cleaned up? Or are the cuts great enough to go straight to what your working on?