A bit of symmetry for you all this morning.
600×300mm x 1/8 inch sheet aluminium.
Sectioned off into 150x150mm sections.
A rulers width either side to mount to the U channel it's the same on the u channel.
If you look at those turquoise X's now the centre point will be the cobs centre point.
I'll have to make a jig for my drill press to take a hole saw which will make the cuts for the cobs to come through.
More updates to come today. Even though other ventures are taking a lot of my time. Ive managed to find a bit for you @Gaz29
Edit my phone uploads pics in stupid orders but you get the idea