from 3.1.5 or from 3.2beta to 2.9

Hello, for a tour coming, we will meet an old eos locked in v2.9. All my show was built and recorded in xyz, will i have to swap psts to to pan-tilt or will eos do it by itself while recording to v2.9? What do become SEM and SE, do they disappear, should i care of something? Are they specific issues i have to be carefull about? thanks for any advise.

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