Coupling adventures, with PVC pipe that is.

I've built several items with PVC pipe, looms, a niddy noddy, a couple of embroidery frames, and the joy of the pipes and couplings is that you can take them apart and reassemble them for the next project. 

Same old parts and couplings from previous incarnations. They never wear out, I can attach them without tools, definitely my speed.

I need a tapestry loom, so I put together this starter, with another experiment seen in the background, but that one's not on. It did give me the idea for the PVC pipe one, so it served its purpose.

The stand can come off if it works better in practice without it, but I like the upright approach to seeing design.

Then I tried to figure out how to create a tensioning device, needed to do the four selvedge tapestry technique I'm pursuing. Tried several ideas but none worked.

Then a YouTube video showed me how to apply threaded rods and hex nuts between sections of pipe on the sides. Brilliant. It led to a merry online chase to find the right size of rod and nut, not yet settled.

Online it's metric and I don't know if m12 is right or only close. Similarly, will the hex nut thread pitch work.. probably better consult local hardware store. I learned quite a bit in the search.

So that's part of tomorrow decided. My inner engineer is all fired up about this.