There's a nice photo of Paul McCartney using a 5 string Wal in Christopher Sandford's Biography. From what i've read, it was a present from Linda and he used it extensively for recording and touring during the 90's. Now, if a 5 is good enough for one of the worlds greatest musicians, it must surely be good enough for me ;-)
 
Graeme.

Great stuff Mario!!!
I used to have a Washburn 6 like your one.
It was a cherry red colour which I bought in Paris when I lived there
 
George