Adam,
Looking good!! Sanding the inside is every strip builders bane...I use an old pair of ski goggles to keep the sanding dust out of my eyes, and a real respirator (3M) to keep my lungs clear. Oh, and a set of headphones to block the noise.
Too bad you didn't catch the trick of bias cut strips for the stems, at least you know now. I can't tell you how many lessons I've learned along the way, everyone has their learning curve.
It's pretty cool to see your hull off the forms, isn't it? Just wait til it's on the water, it's quite the head trip at first.