Feeling like a home! l Paneling our sprinter van doors l Van Build Ep. 10 

You might have been able to get HD to rip that wood down for you on the panel saw. They usually give you one cut free then charge you for each cut after, like $1 or so. But the cuts will be better than what you can do with a circular saw. You can also get a straight edge guide for not too many dollars so you can line your cuts up (harbor freight $40). You could also get a straight edge of any sort (metal, factory edge wood etc) and a couple of c-clamps to run your saw against. Getting a good straight cut makes things look better. You've done a really good job on that insulation! Must have taken a long time to get that all tied up.