moving tokamak entities

In every loop the blitz entities are positioned where the tokamak rigid bodies are but how is player-movement integrated into this?

e.g. when you press forward, what do you do in blitz to make sure the rigid body moves with the blitz entity?

Also, is there a quick way to find the blitz entity in a type that collided when the rigid bodies are colliding?

finding 100 blitz entity types could be slow.