@Dave90 - thanks so much for the reply, and for posting the pics originally! That 30mm spacing really makes these wheels... you don't see them too often, and at std spacing they do look a bit anaemic - so much so that I thought I would want to change to freestyle/cyclone/boost...
BUT your pics have been an inspiration! Now I have a completely fresh notion of my castors - going to get them spaced, and if they look have as good as yours then I'll be chuffed! I'll post some pics when my landy arrives, which will hopefully be this side of Chrimbo