Edward, the man of the situation! I was waiting for your answer as I remembered you told us drivers in Japan had an "outlaw" class to run 1/12th scale chassis and 2S LiPo

In the meantime, I checked some motor specs to determine which 2S combo would have quite the same performance as the classic 10.5t 1S combo (this is the specs from Team Orion VST2 Pro Stock website; because I currently use a 17.5t Orion motor):

10.5t (385W - 4570kv) @ 1S = 16909kv
17.5t (295W - 2600kv) @ 2S = 19240kv
21.5t (250W - 2350kv) @ 2S = 17390kv

(FYI, as it seems to become the new regulation for the 12th stock class:
13.5t (330W - 3650kv) @ 1S = 13505kv)

So, the 21.5t motor seems to be the most relevant option to use 2S LiPo and compared to the classic 10.5t 1S combo.

But in the fact, here in Europe, people who run in the GT12 class can use a 17.5t 2S combo, so why not with a normal 12th car? And I remember some times ago, when you ran in WGT, you could choose between a 1S 10.5t combo or a 2S 17.5t combo (of course at this time, the slightly more powerfull motor for the 2S combo helped to deal with the increased weigth of the 2S battery).

I also would like to have your opinion about this measure: do you think guys 12th scale will move from 1S to 2S batteries in the near future? (with adaptation of the motor of course).

For me, I think it could be a very good solution: no more 1 cell specific ESC, less charging programs, no more booster or receiver pack,...
This could make people coming back in the class I think.

Regards,
G-rem

PS: thank you for the video Edward!