I just pulled the blades off my X380. I hit a steel rebar and it checked up two of my blades pretty good so I'm just going to replace them all.
The blades I pulled off the tractor are the m127673 mulching blades.
I do have both the Mulch Kit & Power Flow system. I don't have an issue with these blades at all... I also found the 3-in-1 blades at Home Depot, and do have a Home Depot gift card. Do I consider these?
I do mulch 90% of the summer. I almost never side-discharge. I use the Power Flow in the fall, and then occasionally in the summer if I let things get too long, or if I have company coming over that I know we'll be playing in the yard the same day or next day before the clippings will settle into the grass to lessen tracking clippings into the house.