Good news. Re interval I rationalise it by deciding what I would do if it went up and what impact another 3 / 6 months would have on the decision.
I have grown to enjoy blissful ignorance safe in the knowledge that 6 months delay won't make a blind bit of difference to my outcome at this stage of the game.
Same logic has made me swap to standard test, why worry about those .00's if it's not going to change my treatment plan or outcome.