I though that it would be interesting to leave this about a week and see what happens... (note - no submissions to G / no links that I have made to the website etc. / so Google is finding this itself - etc.)

googleResults2.jpg

the correct domain is now listing as no 2...
for some reason Google has tried to resolve another URL against it (probably one found against the original designtoo.com domain) giving a 404 - but now listed agains the correct domain as no 3

designtoo domain seems to have (correctly) vanished from the serps


all sounds as though exact matches are worth having

Alasdair