So you're telling me that you have an understanding of TCR and it's proper functioning? If so, please do explain how this function does not work (supposedly) on the sigelei 213. Also, in reguards to reviewers saying the sigelei 213 is firmware upgradeable. They say that simply because the retailer that sent it to them for the purpose of the review has it listed on there very website. Now, in going to Sigeleis official website from announcement of the 213 i did not see at all where firmware upgrade was listed. So somewhere someone screwed up. Blame ourselves for a lack of understanding is basically what i ment. No mod is setup perfect right out of the gate, sorry not even the dna mods...no mod. That is why we are given the ability to set our own values. Now, some people tend to go extreme and then say TC does not work...well, that would be true if you went to an extreme.