I'm experimenting with moving the bulk of my work over to LAB. It would be great if your scripts/actions could accommodate this. A few of the procedures I use the most I've already rewritten (the changes aren't great) but the Blend If numbers will obviously need to change.
The more people working on this and the more sharing of information, the better off the Photoshop community will be.
Best wishes on a speedy recovery.
Thank you for the suggestion, Stephen. And the kind wishes re. my recovery.
I'm aware that L*a*b sharpening is popular right now. I see wisdom in sharpening in L*a*b when one is already in L*a*b for some other reason. But I sure would not put an image through the color engine twice just to sharpen in L*a*b.
My scripts use a Luminosity blend to avoid color shifts.
They use Blend If slider settings with the Luminosity blends for a couple of reasons. First, Lighten and Darken blends can quite easily get you color shifts along sharpened edges. Second, you have a lot of control over where the sharpening halos get applied and where they are not applied with Blend If settings. You get better protection for your shadows and highlights.
The Blend If setting adjustments work the same in both RGB and L*a*b. In fact, the scripts run just fine in L*a*b mode. They apply to all three L*a*b channels, rather than just the Lightness channel. But, again, they use a Luminosity blend. It would be possible to apply them to just the Lightness channel in L*a*b, and that is something I'll give more consideration.
Thanks again for the suggestion.