Create "Live USB" withinn Ububntu

[Grizzly]

Hi All

I would like to find a (preferably GUI) tool to create a "Live USB" with 
persistance from Ubuntu, I have so far used (mainly) 

"123 Universial USB Installer" or "Rufus"

Boh had minor probs, 123 of late failed "IF" the internal formating function 
was used but would work if USB was pre-formated "outside" of 123, persistance 
was never a problem, but the last few versions have not even made a bootable 
Live USB (with or without Persistance)

Rufus has always worked fine but does not have persistance feature

so I tried YUMI Multiboot, has persistance but again cant seem to make a 
bootable USB

LinuxLiveUSBInstaller (LiLi) has all the functions required (GUI a bit too 
garish for me, but beggers...) works fine (so far) but AFAICS has not been 
updated in 2.5 years, so always comes back saying "Distro not in compatibility 
list but will try..."

So are there any GUI USB installers with persistance for Ubuntu, I have googled 
and found many for windows but nothing else really