"SP" is most likely "SamPerf" or "Samuelson Performance", already the canonical manufacturer of the d-series prerunner (which coincidentally shares its name with "Jared Samuelson" a.k.a. ferrettank )
Yeah, that makes sense - also, thanks for that tidbit of info! I wasn't aware that SP was meant to be SamPerf - that brand not only makes the D-Runner and (likely) the Hop-Crawler, but also the Trophy 1000 wheels.
I'm not in the discord so I just rely on my discord friends to fill me in (or this thread) on whats happening in there