You can get omniwheels from RS, but they are only plastic and are only suitable for feathers - and would definitely not take a hit from anything spinning. I bought 2 pairs of 50mm to put in Mini Mighty Mouse, not got round to it yet though

Here is a link - http://uk.rs-online.com/web/search/sear ... &x=25&y=13

The omniwheels on Meggamouse are aluminium and very tough, thanks to Leo, who saved me a few quid. As to their efectiveness, they replaced rubber wheels and has improved the turning ability and are a better setup than castors as they are chain driven from the rear wheels.

If anyone is interested is looking at them I will put them in the toolbox for Maidstone.

Trev