I am in the market for one of these too. I have paypal and will pay a resonable price for a working unit!

found one!

Great Christian ...Let us know how it sounds and works for you!

i love it!  i run it thru the fx loop on a gk head--i am going to try and skip the gk pre and go straight in to the power section now that i know that it won't bypass the di out.  i have found it very useful to turn the direct gain to 0 to clearly hear what is being filtered. then bring it back in.  what i would really love is a shallow 1U rack case for it so i can bring it everywhere instead of having it racked up with a head.  i may just have to build one.  the sf-2 brings real presence to your sound and (maybe this is my imagination) allows you to optimize the cabs you use.  getting the most out of them.  one day i will have an f1-x and a power amp too and just use that.

what i would really love is a shallow 1U rack case for it so i can bring it everywhere instead of having it racked up with a head
 
Or you could do this! ;-)
 
http://club.alembicguitars.net/Images/394/15919.html?1106836442
 
Just kidding off course, but it's actually very easy to D.I.Y. and it looks great!
 
Wilfred

i just wish i had the tools!  plus i need a cover for the front and back so i don't ruin the poor thing!