To answer some questions:
I don't game so don't have a rule-set in mind. The army was just put together in a fluid way and has ended up where it is now following no particular design... I just added what I liked.
The miniatures (troops) are for 28mm but they are space Dwarfs (22mm tall) called 'Grymn' from here:
http://www.hfminis.co.uk/shop?category=miniatures
I have converted all of the troops to have heads from here:
http://www.pig-iron-productions.com/
Since my last post, I have had to replace my computer and I have had to re-find all of my favourites (hence the delay in replying) but on a plus point, I have finished the special unit I was working on:
I have also finished the first of three 'Clanker' units (the Grymn in the top pic is to show the size of the walkers):
And have made good progress on the second unit:
If anyone is really keen to know where everything came from, I'll post a list... but it may take a while to put together