Make some posterboard templates so that all your cuts are the same..... Also measure carefully to position the template correctly on every post. Leave the doors on the car when you make your first cut. Brace the heck out of the car from side to side BEFORE you cut anything!!!!! A laser level on a tripod works great to mark the posts for template placement... Wait till winter and send me a plane ticket, I could use a paid vacation in North Carolina!!!!!!!!!