Thanks for the feedback. Colour of t-shirt is really hard to get a consensus on. Our TAS t-shirts are all green, and we've had a lot of people say they'd prefer them in grey or black, and a few of the comments here say the opposite! The difficulty with a green shirt here is that both logos feature green, which means we're restricted to rendering the logos in monochrome.
So, we're almost settled on this, and will be producing a black polo with the two embroidered logos (see below) and the gray cotton t-shirt with the slogan 'Smallholders dare to be rare'.
Now, who wants to order one?