I replaced my batwing with a Jack. It was very easy the problem came about the fifth time I used it. I had a weak signal and turned off the 12 V DC and then back on. That killed my Jack. Luckily I had the old batwing and put it back on. The Jack did get digital signals better; before it died.
I just replaced mine yesterday. For over three years my water heater sometimes would not start. The light on the switch would come on and stay on until I went out and reseated the connector to the board. Each year it got a little worse. This year sometimes the light would not come on; even though I had 12.5V at the board. The end came when after 20 attempts to start it by removing and reconnecting the connector it still would not start. I bought a new board and now it starts every time.
Hope you mean straight PRE MIXED antifreeze not pure glycol. Pure glycol (anti freeze) must be cut with water.
Four gallons of pure antifreeze when added to the four gallons of water that did not drain equals a 50/50 mix.