A bit more progress on the MTB. I managed to get food poisoning on the weekend, which meant I spent the best part of 24 hours sleeping and running to the bathroom. On Monday I felt well enough to do a bit of work, so glued on several 1/2" thick pieces of balsa on the bow, which I later sanded to shape. Today, after work, I sanded the chine stringers flush with the frames, which allowed me to put on the first bottom skin. As the instructions suggest, I cut the bow section off the hull piece and fitted a piece from the stern to frame 2. This is now fixed in place with wood glue, and held with various clamps and pins. I'll let that set overnight, then repeat on the other side tomorrow.