Concept2 Forum

You might feel a very slight breeze if you're sitting upright, but not enough to cool you significantly—certainly not like a fan blowing at face level. Even with a ductless split system heat pump running in the room, the airflow is subtle and designed more for temperature control than direct cooling...

The wobble in the seat is often linked to wear either in the seat frame or the rail. Since you've already replaced the rollers, it could be the seat frame or the bearings inside the seat that are causing the uneven movement. If one side of the seat lifts more than the other, that could indicate wear...