Yes they are...I have installed a 500T tank, to me it has a beautiful line, but no room for the coils. Now, I can relocate them to just under the tank, towards the front upright, but I have been working toward a "clean uncluttered" look. So I was hopeful to move them under the seat.
Now I have a confession, I havent even looked at whether the wires in the coils can be replaced, I hope so as I know one is ready to break off
So Photolar, you must have a point to your question?