I once again made a random thought real. The Quicrun is the only one that's easy to find, sadly. The FL-Tuned seems to exist only outside the US, and the CR-Tuned is certainly cheaper (under 30 bucks) when purchased through RCMart or similar. The Quicrun is available everywhere.
Relevant affiliate links:
Quicrun 540 30T [ Ссылка ]
IG: crawlercanyon
