I got asked about my waving frame same time ago. Here are some pictures, finally. I hope you can see everything even though there is my current project on it. This weaving frame is not historically correct! No evidence of tablet weaving frames like this on were found from the viking or medieval age.
My weaving frame is self made from hard wood. The side pieces are cut from wooden plates. The struts are made from 20mm thick round logs.
Pic 1: The round logs are glued into holes in one of the side plate. Except for the second one from the front. For this one there is a slit in the wood so you can move it to vary the tension of the band you are working on (see picture 4 for details).
Pic 2: The other side can be taken of (very handy for threading the frame) and put on again. There are holes in it for the logs. For the one where you regulate the tension there is another slit. And there are some smaller holes for the some of the logs in there corners because they have some bolts on them.
Pic 3: After putting the side plate on you only have to fix it together with some nuts (which are hidden in those wood pieces). It's more stable like this and the band you are working on is a little bit protected. Also you can carry it around more easily.
Pic 4: Close-up of the movable log for tension regulation.
Pic 5: Close-up of the logs.