Originally Posted by Apoth
I personally have done this. Intended to order a D4. Bought a D1 by mistake.
I freaked out one day on my way back from Glide that I had accidentally bought an M1 instead of an M4.
Thankfully, I grabbed the right disc.
It's a little annoying, but I'm not a huge hater on the disc naming, and at least the number patterns seem to be consistent (1 = Most overstable, 4 = Most understable, and the tweeners making up the stability difference).
Now if the discs could just be as consistent as the numbering...