Newbie gear question

[Andy Bettis <andy@dance.demon.co.uk>]

Hi folks,

I'm a newcomer to this list so hi, my name is Andy and I'm a looper. 
I've been using a Line6 DL4 and while it is fab there are two problems 
with it for me - the loop time is a little too short and there's no 
undo feature to remove things from the loop. Can anyone recommend a 
unit that might suit me better? It's for use live so a stomp box or 
footswitch extension is an absolute requirement.

Rev. Andy