I use a serpentine belt on an old strap wrench handle – gives me the ability to go around an oil drum if I wanted to.
But it’s occasionally difficult to get the strap on a flywheel tight enough to hold while I shift my grip – especially the skinny flywheels of the battery ignition motors – really need three or four hands to do it right, so I’ve been thinking of fabricating one that uses a ratchet strap and a long handle.
Ran across this – an interesting concept for those of us who like to make their own tools: