Anyone who succeed on making the M13-M9 U-vibe model sound like a real Univibe?

I never tested a real Univibe, and from what I heard on samples on internet I really like de Fulltone DejaVibe, also I liked a doityourself pedal NeoVibe:

http://www.youtube.com/watch?v=lxMSWscw9lI&feature=related

http://www.youtube.com/watch?v=KrulFZQI3gA

I already tried but I didn't got close, I want to use it for slow ambient chords.

What effects can I mix in the 4 FXslots to make it sound close to a Univibe or Dejavibe?

I've read people put 2 U-vibes on diferent fx slots, others add a little phaser, others a little mod delay, also some people insert a filter before it, and others put a volume swell FXslot.

Sorry if I should tweak more, but I already spent time, and I know that combining the 4fx slots with the M13 you can do magic!

I just want to get some ideas from the experts to check if I really can get the accurate sound, before spending in a vibe pedal, as you can see I am not familiar with a real Univibe. Also surfing on internet I found not too much info about U-vibe setups and tweaking. I heard a lot of people said the U-vibe models are dissapointing, but as I mentioned before I think that combinig Fxslots maybe there is a path to get it sound close.

Thanks in advance!

Giax