Cars new car mod closed test group?

[GideonSward]

B"H

Hi,
i'm looking for a "new mod testers" for new mods that are in early stages.
a new car mod i've been working on is getting ready, and i'm looking for feedback.
since the mod is not in a final stage, i wouldn't want it to "spread around" prematurely.
a "closed tests group" would be a good safe place to work on & improve mod's and better the builder.

is such a thing exist and if not what you think, and where can a modder upload betta mod's?
best regards
gs