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Hi there,
Sure I would be happy to help! :)

I do print the blades separately, I could not get them to print well all together.

Here are my settings for the first (inner) blade:

Here are the settings for the rest of the blades:

The first difference is the support for the first blade, and bottom layers are on.

I recommend printing these separately, they seem to come out a lot better, stronger, smoother!

p.s. Dont forget to change your Line Width to about 0.85mm or so. The images I uploaded of my settings dont show this, I forgot to change the Line Width to 0.85 when I made the screenshots for you. This is very important to get a good solid strong blade!