It's a nice idea, for sure, but it doesn't look looted enough, if you ask me. If you take a look at an Ork Looted Tank, it looks almost as slapped together with junk as any other Ork vehicle, rather than being just an Imperial tank with orky weapons. Right now, it just looks like a regular Riptide weilding Ork weapons, rather than a true looted Riptide.
My suggestion would be to add more random plates on it, give it some teeth or something. Take a look at
this Looted Leman Russ and
this Looted Baneblade, how they look like they're Ork creations. Giving it a nice orky paintjob would do wonders as well.
Anyway, sorry if I'm sounding too critical, it's a nice model with a well-implemented idea! You might not even be going for a super orky look, but I'm just giving my two cents.