Escher
Babby
Something like a half truncated cube.
I don't have a enough cubes to make extension cubes(I'm pretty new to cubing, only 43.97 average).
I only have a 2x2, two 3x3s, a square 1 and a 4x4.
Since I live in the UK it's pretty difficult to get your good cubes.
Why don't they allow transparent cubes in competitions?
You can edit your posts, if nobody has yet replied to you it's unnecessary to triple post.
You could perhaps join two of your 2x2s.
They don't allow transparent cubes because you can see more stickers/cubies than non-transparent cubes, which is unfair.
www.puzl.co.uk is a good place to shop in the UK, postage is very fast. See my thread here:
http://www.speedsolving.com/forum/showthread.php?t=15995
The only problem is the prices are quite expensive.