I use my fillet knife, not electric.

Cut behind the gills on each side.
Then down each side of the back bone.
Cut down the ribs until I get the fillet off each side.
Then lay the fillet skin side down.
Poke hole in tail, to hold the skin, while I slide my knife between the skin and the meat, pulling the skin away from the meat.
Once skin is off, I will de-bone it.
Then ziplock the meat and keep it on ice till I get home and can vacum seal the meat for the freezer.

I can fillet two fish to my hubbies 1. Lol
No I don't hack the fillets!
Been cleaning fish since I was 10 yrs old.