4. Then I removed the four screws on the adapter ring that holds the
C-Element and o-ring in place.
The tube with the c-element (and glycol) removed
It's very important that you newer touch the C-Element on the lens just hold
it on the outer ring, you should also be very careful with the o-ring that seals
the liquid coupling and control that it's not damaged.
The new red c-element with the adapter ring that holds it in