I have a 2004 400 and I wanted to make extra keys. The key I had was a "Y1" blank. The I went to a hardware store and they told me they didn't have the blank, but had something close. The keys they made in the machine didn't work. The problem seemed to be the point of the blank was too long and therefore the key wouldn't go all the way into the lock.
So I ordered some Y1 blanks online and went back again.
When they put the blanks in the machine it didn't line up correctly but they made a few anyway that didn't look right. Then, another of the employees came by and made me several, virtually by hand, using the key grinder but not clamping it in the machine. Voila, they all worked.
Bottom line is to see if you need the Y1 blank and get some and ask a competent key person to do it by hand and maybe you'll get lucky.