If you have rivets on the bottom of your prints these are very good places to land supports on.
Better still, always think of your prints as 5-sided objects.
The curing station I have heats to 60º and the cures for an hour with the heat on.
I don't think I've ever seen breakages along layer planes.
If the elephant's foot can be controlled then the best orientation is likely to be with a long edge on the bed and the rail gaps in the chairs vertical.
Curing will polymerise the resin across the layer boundaries. I use 60ºC for 60 minutes for an ABS-type resin. These values were inherited from a similar Fromlabs resin.
This video has more information:
https://www.youtube.com/watch?v=886X2geCRrA&pp=ygULY25jIGtpdGNoZW4%3D
I found this on YouTube:
https://www.youtube.com/watch?v=BEzDh4RwpaM
Which seems the most likely explanation I've seen.
Who hasn't panicked and ignored the non-intuitive best course of action?
O'corse the guy might be wrong.
Most people think the media is reasonably credible until they write about a subject the reader has some knowledge of, and then they become woefully uninformed.
It's no good guessing your settings, each printer is different.
I suggest using UVTools to get the basic settings:
https://www.youtube.com/watch?v=lRbZw6GbGCI
and Cones of Calibration to check they will work.
https://www.thingiverse.com/thing:5416700