Here's the first question on my HH set-up.

The fly seems like it will be fine for sleeping but rather small for a rainy day 'in camp'.

If I do decide that a larger fly is needed, do I:

a) buy one

b) add on to my existing fly on all four sides to retain the basic shape

c) find a way to add a smaller fly onto the ridge and extend out for space

I did a quick search and found a some information but as I look at my options I think (b) is my best bet. The fly I have is made of:
"Canopy fabric: 1.1 oz. 30 D Silicone nylon" (from the HH site)

Thanks for your input.