You don't always have to trace all the parts in the kit. Most plans will have MOST of the parts on them. But here's the trick, most of the manufacturers will leave off crucial parts when they draw the plans. This how they supposedly keep you from duplicating their kit. Simply go through all the parts and identify what's not on the plan. Then simply trace those parts, I usually do it right there on the original plans if there is room. Then do as Campgems stated above. Get copies made of your plans. Build from the copies and keep your originals in a safe location.

Ken