I've tried a feather in a Weber DLC, which has the same head geometry. For me the razor quite mild, not aggressive at all. I usually put 2 shims in the Weber to give it more bite.
Yes, I shaved yesterday with a Weber Polished Stainless and a new Feather and got a BBS shave, WTG, XTG, ATG. Two very small weepers. Excellent combination for me....I have found that Feathers work well for me in a R41, Merkur Slant and DE89. Hope it works for you!
I've tried Feathers in my Weber ARC. The razor is very smooth and efficient with a normal blade and it continues to be so with a Feather. I found that I got more shaves from a Feather than a standard blade.
Tried it and had a great shave. Just as smooth. As my R41 but not as irritating. Really the only difference I notices is that the shave doesn't last quite as long. Otherwise it was great.