I'd leave her where she is until after she drops, then she should probably be in a larger enclosure. I've had females virtually not leave the heat for almost the entire 4 months, with about the same temp gradient as you discribed (although I maintain them in 8' cages). Under similar conditions, others seem to like to move on and off the hot spot regularly. On average, it seems gravid females typically move around less than "non-gravid" ones, so if she has a spot she likes, she's probably OK.

Best of luck!

Mark
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uncommonboa.com

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