New stringers were cut and fitted. The old channels are being trimmed to bed them down. Normally, they would be totally cut out at the bottom, but I am leaving most of it there because it is in good shape, and will only reinforce the new glass "caps" that will cover the new wood, forming the solid stringers. If I was to do this again, I would remove the foam first then cut the stringers about 1" from the hull. It would have been much faster. Live and learn.