has anybody got or used one of these as i am loking to buy one but i haven't seen any results, nor can i find any reviews on the web.
any help would be appreciated
Dan 

I made one similar to the one shown in this series of videos.

You can usually get everything you need in the £1 shop 

Very easy to make and it works 

cheers John.

http://www.ngaugeforum.co.uk/SMFN/index.php?topic=308.msg5783#msg5783