Just from reading various sources and squadron histories, it appears, based on the names of the pilots involved, that more than 3 V-1s were 'tipped'. It was, it appears, a very common practice.
9251 V-1s were launched and slightly less than 50% of them were downed by various means. We can surmise that if only 3 were 'tipped' as a means of destroying them, that it would even be mentioned in the historical record as being a 'common' or 'preferred' method of destroying them.
I have some very specific V-1 data in the archives, I'll see what I can find.
J