if it was any good I would have thought Patrick Godet would have tried it on his fabulous Isle of Man Grey Flashes, would it have got him the first Vincent 100mph lap, he was very very close to it.
I do think that is a good standard. Patrick was very aggressive about lightening the new Flash and it weighed approximately 267 lbs. dry. Of course, when racing, the object is often not to advertise that fact. Much of the lightening is obvious, but one would rather have a technical inspection where the inspector would find the lightening "elegant" even if it aggressive. The through holes make a statement that is better suited to public shows rather than racing.
It turns out that Jeff Decker did a version of this type of blade lightening on an early custom Vincent. I would suspect it might be a throw back to Robert Sharf's work.
Often these mods are not necessarily dangerous, but they enlarge the roster of items that may fail during a crash.
David