RRD + Step in milliseconds

Hello,

I am researching rrd-[developers|users] archives whether someone have
done the extension of the RRD tool for milliseconds/sub-second stepping
(e.g., --step 500ms) in the past?

To date I found some mail threads with references to the subject but
without an explicit success mark.

Using this sub-second extension, I want to research mechanical gearboxes
installed on remote sites in the field collecting the analogue data from
gearbox' sensors in an RRA over 1 year via site local network. A gearbox
aggregate has something like 150 data sources. (~50) of them need to be
recorded with 100ms step. The system, I have in mind should work
off-line/autonomously.

With best regards,

Michael