Originally Posted by Solara

It is NOT the EX cannot use the 528stock software....it is the ESC should not be used with 2S LIPO. If you need the ESC that used 2S lipo on a TC, like what we recommended, you should get the GT2.1 ProStock.

It is difficult to explain but the simple way to say is...the EX has a low profile heatsink, and ran with NO FAN....the ESC itself is phyically capable to run any software with any motor, but with the smaller heatsink and no fan, it will get overheat easily if running in 2S Lipo, however, if using on 1S overheating most likely is not a problem on EX...thats why we tried to tell ppl this is a 1S ESC dedicated for 12th scale and 10th WGT, but NOT recommended to be used for 2S on TC.

So overall...it is NOT the software that it must use or not use...it is the number of CELLS that you should not be use...in EX case, it should stick with 1S only....