If you took the scheme Korydex modified from the
original Driver scheme to turn it to Time Trial for the challenge and changed to 20 seconds again, being the only modification, I have to inform you that you actually uploaded the exact same scheme as the original Driver scheme by
sbs, but changed its name to "Duo Race" because that is a name that
you prefer to call it. When someone upload
sbs' scheme to the platform it may be considered duplified by this scheme that has a different name and don't credit the original author, instead, people may think that it is your scheme, specially while TUS still doesn't have an authorship field for schemes. To be honest, I never upload any scheme that was not made by myself here, because I don't want to be seen as its author, what happened with me many times. I thought for example that
Goku Battle Arena was created by TOMT, because he is the uploader, and I wrote that on the wiki scheme article, until pavlepavle corrected me, because
he is the author. And this is something that always made me very sad about TUS: not having authorship for schemes. People may think that the most famous schemes of the platform were made by Warg for example, which probably never created a scheme, or at least released a scheme, and doesn't understand much about scheme making.
This is something very recurrent: I think all of your schemes are modifications to the original schemes. The original schemes are never fine, you always modify things, sometimes great modifications such as the ones of your variant of K2S, but sometimes there's almost no difference from the original or the version looks worse, but you create a new one for a cup. I think sometimes is just nice to credit and recognize the schemes other people thought a lot to create them.
PS.: I know that the original scheme was not ported or updated to 3.8, and is still in the old RubberWorm scheme format. Lupastic's scheme file has Extended Scheme Options settings, but there's nothing that is new - except Worm Selection settings that are exclusive to 3.8 - compared to the original scheme, I believe.