Phoenix67, thank you for sharing with us. The much rapid cycles you are seeing in your husband could be because some MLCers, or MLCers at certain point in their journey, can be more like cyclothymic disorder (one of the 3 components of Bipolar - Bipolar I, Bipolar II, Cyclothymic Disorder) whose cycles are faster but also, normally, milder than Bipolar I and II.
MLC also has traces of other psychiatric disorders, so what we see is never just like a single disorder. Like you said, they are multifaceted.
Not all MLCers are high energy. But your husband's having a 6 pack and high energy on house repairs are MLC behaviour. My cousin who had MLC was never high energy, except for work and home tidy and keep buying new stuff for the home.
Your psychologist is correct, we all have a bipolar spectrum with our minor ups and downs. Also, has you mentioned the difference is that a bipolar person will have those ups and downs further/more to the extremes and faster.
I like your idea of MLC as the pendulum being off balance during MLC, then back to normal. It makes sense and matches a lot of what we have, in the past, discussed here on the board about MLC.
What, so far, none of us was capable of understand is how the MLCer pendulum gets back into normal range. Maybe they really need to go till the end/rock bottom, waste/spend all they have, and only after Liminality can their pendulum start to get balanced again...
Sometimes good things fall apart so better things can fall together. (Marilyn Monroe)