Hi there , my hubby says definitely a skill saw- it will be quick easy and if measured and marked , perfectly symetrical and straight. to start the first cut, you must pull up and away , the safety sheild covering the blade. hold the saftey guard shield up while aiming the tip of the saw (round disc like blade) down on your first mark at a somewhat of a 90 degree angle - start cutting, and then lower the blade til your saw is laying flat THEN start cutting forward. its a lot harder to explain then it would be to show you. if you dont know what i mean after reading this i can probably draw a diagram and post it as a pic here on this thread
hope this helps,
happy building!
JP