I'm curious if anyone can tell me what the letter designations are for this placard, it's tough to read. I've only got a low res photo: Model TDS/E/T/C/N/C or could be Model TDS/E/V/C/N/C Would this be an Easiturn 3? The "C/N/C" is obvious.. but what does the "E" and "T (V?)" designate? I am interes...