Thats the exact piece of kit I use.

WARNING though, once you realise how stupidly easy it is to make your arches massivley bigger all of a sudden you will go overboard as its quite fun and addictive (greg, bigwig1074 on here can vouch for that ), and suddenly you need wheels 2inchs wider than before

This is how this was done, STANDARD arches, plus the above tool equals 11inch wide wheels...