Neither have I. And yes, there have been quite a few uncomfortable moments so far for me. Probably more to come.
On a more positive note, I got the drives tuned a bit better yesterday and the motors working with the controller that was specified originally. It's is not very smooth, and very clunky to program.
I am very keen to see what the Arduino can do with the system.
Here's a link to one of the first test throws I did last night.
Cheers
DM