You know, with Tetenal E-6 kit reduce First Developer temperature to 30,6 °C and use the regular time, the rest of the processing should be done at usual 38.6º, so after first rinse you have to set 38.6 and wait until the bath temperature and chem is at 38.6 before throwing Color Developer in the tank. Perhaps you new that, but let me point it because I saw people doing all processing at 30,6 °C to pull, only 1st developer should be made at that lower temperature.
This will deliver less contrasty slides that may be less suitable for projection, but you will have less blown highlights so scanned images may be ok.