I use poster paper same as your card stock I would guess I put the ruler on it use a knife against the edge of the ruler cut about half way through fold it divide by half the with of what I'm making cut that off then draw the curve cut that off lay it on the paper draw the outline and done maybe 1 min and it's perfect . For the cutting I use a head knife and depending on how sharp a turn I may use a pattern head knife they make the cutting very fast and accurate .