1) What I meant by practice was estimate how long it is going to take you between when you heat your sample and test time. When using quick fix the temperature is the only major thing you have to worry about. Just heat your sample up a few times and practice different methods of keeping it warm and see how long you can keep the temperature in range for. It would just be good to know this before the test.

2) I doubt they will change their procedure. Even if they do, what is your major concern?

And I would have to agree with you, in your situation if you can use synthetic urine I would go for it. You would run the risk of still testing positive otherwise.