Why not use PUMP?
"Velocity Tools"
PUMP is not a tool, and does not directly affect particle velocity.
True, but then why mention AIR and VACU?
Because they are examples of tools, emphasising that the suggestion is not for a new element.
"Unlike ACEL and DCEL, they use like AIR and VACU."
That could be expressed more clearly, but ACEL + DCEL = particles, AIR + VACU = tools. So "The suggested items are not particles, they are tools".
wow... its nice to see some of the most creative people I've ever seen on tpt with programing and computers come up with such great names... fast and slow... I just dont know how they do it...