Take a fine toothed hack saw blade, cut into and wipe a bar of soap, paraffin, or bees wax so to coat and fill the teeth with soap or wax.
Let hubby hold the rooster for you and control the Rios' legs and wings.
Let hubby present the rooster's lower leg to you. All he will need is his thumb and forefinger to control this leg.
start sawing around 3/4 inches from the rooster's shank or foot.
Hubby can quickly turn rooster around with one quick movement and the leg that was lower and that you already have trimmed will now be the upper leg.
Sticking a hot potato or other vegetable onto a roosters' body parts sounds like something that ISIS does to its captives.
Keep the bar of soap close at hand in case you do have a little bleeding. Then use the bar of soap to press down on & wipe the spur stub to stop bleeding.