Making three stretched canvases for tryptic

Making three stretched canvases for a tryptic painting. First I made 3 identical sets of stretcher bars from pine, glueds, screwed and nailed. Next I stretched some primed canvas over them. This was my first time stretching canvas from zero. In the video some ripples may be visible at some spots, I did adress those later on of camera so canvas was nice and tight. I painted a water colour effect world map on them in acrylic, the pictures are terrible and don't do it justice, everyone who has seen it in real life had only good things to say!