First of all, if your neuro is seriously trying to convert with that precision, he is just fooling himself. It is not just a coated tablet but rather a polymer matrix that will behave entirely differently. So it's trial and error time. You have to find what works for you.

The first thing to do is to minimize the initial wait to "on". Read my post on using peppermint here for Pavlovian conditioning. Another tactic is to try to speed up your gastric emptying since levadopa is absorbed in the small intestine. You might try ginger for that.

Finally, avoid that "off" completely, even if you have to take extra to do it. It is far harder to climb up out of that trough the second time and the roller coaster effect is a problem of its own.