how to transfer keyframed animation?

[CLF73]

It's not so simple to reference scene keyframes from particles because Max itself is not multithreaded, so particles trying to read scene object keyframes from separate threads will cause Max to crash...so some kind of caching structure has to be created to import the keyframes in a thread-safe way...and that's what tyActors do, but your boards are not all identical I guess so you can't just apply a single tyActor to all the boards.

Yea, makes sense .. I guess 

As a potential future feature, It could see it work using a separate birth object with inherit POS,ROT, Scale on.

I try to visulize the concept here (video), using a Position Transfer Operator.
I would add a new "transform transfer" operator, then set its target to the separate particle system. In this case the imported birth operator particle.
Once done, it would only copy over transform matrix from the target to all particles in the current flow.

There are a couple options here:

1) Do your rotation with keyframes in a Rotation operator, using the keyframes rollout to sync the timing to event entry or something.

2) Do a tyActor setup but have it hidden. Have each tyActor located exactly in place of the 'real' boards. Then have the 'real' boards linked to the hidden animated tyActors using Set Target (link to target enabled). It won't matter that the tyActor geometry doesn't look right (because it'll be hidden)...only that the tyActors are located exactly where the 'real' boards are, so they act as a sort of animated proxy transform.

Huge thanks for taking the time to help