Can I get away with just buying the cheapest one going?
Yes, you may even get away with none.
que?
Try taking them all out you maybe surprised! You can certainly get away with not plugging them into every socket without issue.
Anyone come across this one?
http://www.adslnation.com/phpapps/c...ducts_id=54&osCsid=6cagbnkc07gqvn9d2kgfo3ahc1