Yes 1.5" ferrule, installed on both the boil kettle and Sanke HLT. The MLT is a upside down Sanke with a 2" Tri-Clamp to 1.5" reducer.
I found a old GreenLee 1.5" panel punch on e-bay and it cut the perfect hole for the OD of the ferrules. If anyone needs it just let me know and I will send it to you, just pay for shipping.
I really like this setup as I will be able to remove the elements and be able to give the boil kettle a good scrubbing. It also lets me put the elements and cords away when not in use and reduce the chance of damaging something.