So far I used HW, Viper and toro 120A (old version)
HW is good, toro also ok..and i just bought Toro 150A (blue) to try, can update you next weekend.
But I will not recommend VIPER...if people their website setting is wrong, then why show it on their website...Also the shop i bought it from mention I HAVE TO USE THIS SETTING, and i followed...what happen?? Smoke came out after 1 lap..
Well..i used other brand and all have their good and bad, but nothing like viper will get burn off after 1 lap..
Ching.....when I burn my second Viper in the mid of TRC oil Track. I guess really my seting, like gear ration have issue. However, once it burn, I change to HW in the next 20 min. And run few packs without any issue. And even can change to high teeth of motor gear for higher end speed.
I write here is just share my experience to ching for prevent from item with potential issue. 1.6 K is not a small buck to numerous while other product like Tekin is selling at similar price range. But that is from a high reputated design.