A more detailed answer on #1.
It is possible the IIDTool can't give you the same height lift as rods - here's why.
The IIDTool (or others) are letting you play with the individual adjustment values for each height sensor. Each height sensor value will be a little bit different - so to level the car, there is a set value range for each sensor (up to 250). You cannot exceed 250 or it will throw a fault. Therefore the maximum lift you can get is the difference between highest value height sensor and 250. If you have a height sensor at 210, you can go up 40 points (which are almost equal to mm). But if for some reason you have a sensor with a much height reading like 230, you can only go up 20 points and you won't achieve a good amount of lift.
Rods don't have this same disadvantage as you are physically making the reading lower for the height sensor. For the majority of users the IIDTool gives a good amount of lift, but on some vehicles it might not get you as high as you want.