As you are an experianced glow flyer I do not detect any real sense of commitment in your post about converting to electric or the cost commitment in support equipment and plenty of batterys among other things to rationalize going electric just because of cleanup.

The AX's are superb and beleve either one would be excellent on that airplane although I have not flown one since it is rare in my part of the world.

Also do not discount the added liability with a seaplane of any kind of shorting damage to the expensive speed control when a flopover occurs. Glow engines are mearly blown out and started up with no problems if immersed.

John