DaasYochid: “CB, only under very limited circumstances, specifically, that you know that your adjustment will not initiate or stop a flow of electricity. The indicator light doesn’t ordinarily help for this, as it merely indicates if it’s set to maintain the programmed temperature.”
You are correct. It’s interesting how the Psak has evolved. Years ago, in communities where gas ranges were not an option, the Psak for electric ranges was simply as how I previously stated. Now, the accepted way is either as shown in the Star K publication or to obtain the Shabbos Mode electric oven per Rav Heinemann.