Building a Tri-Loom

I decided to build a Tri-Loom, after seeing Thiftwizard’s Tri-loom when I visited her house for a spin-In.
I haven’t found any where in the UK that sells them, and to be honest its no great feat of engineering to make one.

I went to B&Q to look for suitable wood, they don’t sell Hard woods, but did have some fairly hard smooth planed wood. I bought a pack of 4, 2.1m x 44mm x 34mm.
The resulting loom is 2m on the inside edge of the long side. Which should make a nice sized shawl for someone my height.
For those who have no idea what I am going on about, have a look at some building instructions here.  I also took some inspiration from this blog.

I chose to set my nails on the hypotenuse (longest side) at 1cm (3/8inch), giving me 2oo on each side.  I figured that 1/2inch that everywhere seems to recommend would give me too loose a weave for the yarns I am likely to use.