Here I'm adding lining on the inside to give more glue surface between the sides and the top. This is a guitar building step that I've never seen in jarocho instruments and one that I've never used in them. I made the call to do it anyway. Can't hurt. This is where I decided to reinforce the tall end grain with thin strips of mahogany. In furniture making you wouldn't glue pieces in opposing grain direction like this due to different expansion and contraction rates, but mahogany is a very stable wood and I've seen this before in old instruments. Again, I went for it. Epoxy mixed with mahogany dust makes a filler/adhesive. Mmmm, good stuff. Yes, that's right, you see roughed up epoxy fiberglass on the inside of the body front. Another call I made for extra strength. Last photo is the leveling of the body edge with sandpaper glued to a flat piece of wood to get a tight, clean glue joint to the top.
