The only problem with an electric knife is you cut through bones that you can feel with a manual knife. I use a Rapala and as for sharpening it just takes practice. I have a diamond steel(Like chefs use) and the Rapala takes an edge really quick and hold it.
Greg
"Getting close to the game is the joy of Bowhunting for me, the harvest is a bonus."

Live 15 ft Python after eating a small Antelope!