little tip, you can count threads to get it level, but never works for me
so what I do is get the about the height I want, then get a measuring tape, (on a flat surface)
then measure from the ground to the arch (going through the centre cap, so it's in the middle) and try and get each corner about the same, otherwise it will handle she-ite
(obviously a proper "corner weighted setup" is the best, but I cannot afford the price they charge
)