"He who marches out of step hears another drum." ~ Ken Kesey
We have, and have done it for many years. I can't remember the first time I got a double beveled blade but it must have been 7-8 years ago. I love different profiles but if you don't have a printer that will use them properly then they are worthless. With the new press we got new traditional blades and I use them for vanilla prints, some top color work on underbases and simpler prints, but I use the specialty edges and Joe Clarke's designs for all white ink printing and/or process type prints. I love using blades where there is a bevel built in because it allows you to print with some angle without having your blade angled and risking the edge buckling. Running at a 90 degree angle but the bevel providing some angle allows us to print with much less pressure than a traditional blade. We also can print faster with that setup. A traditional blade set at a 70-75 degree angle running at 30"/sec will probably hydroplane and not shear the ink. You don't have that problem with a beveled blade rather it be a double bevel or something like Joe makes where one side is a traditional straight edge and the other side has the bevel. You get 2 blades in one, and they'll deposit vastly different amounts of ink when used correctly. You'll never get that type of versatility with a traditional blade.
in Sonnys Defense, ive used his bevels for a year or 2, and they work well for certain applications - top white - both plastisol and hsa... i have not used smiling jacks