What was the first ever Nerf Mod.

I know this is almost an impossible question to answer as written in the title, but maybe more like...

*What was the first ever "effective" Nerf mod.
*What was the first "published" Nerf mod.
*What was the first Nerf mod to do the community good (not necessarily effective or published).

I was wondering about this, thinking of coming back to Nerfhaven, hey what started this all?

Hope this question takes you back.

--Cartaya