And the other thing, im not saying the manufactures schedules are right at all, im just trying to see it from their point of view.
I think the manufactures schedules are well overdone and require more than is necessary, but Schedule 5 is the exact opposite offering too much flexibility for people to do the wrong thing by it.
Both I think are not really meeting the needs for real word good servicing requirements as they are both too far in each direction from what actually should be done in reality. A combination of both seems to me like the best option or possibly the introduction of new system at an intermediate of the two.