For what its worth I just received a 28 ET through Jaco's, and I asked if I could get the Labbed version, and she told me I didn't want that one, becuase it would break. Then when I got it in the mail, it had L in the part number and said lab finish on the box. It seems like it is pretty sturdy, my mazco 28, worked chopper, SRX, and comp all have thinner blades. I belive the above explaination, that if you order a 28 ET it will come lab finished, if you want more grind you can send it back for more work.