When I first saw the Flexshaft equipment I thought "Wow! My ship has come in! This will be a game changer for me doing my drain calls! I won't have to lug these big Gorlitz mainline machines around any more with 125 feet of 5/8" cable !!!!! I can just set up this nifty little thing and best of all you can run it with a good cordless drill!
Its like pushing a wet noodle up hill even when you use the best Picote and Renssi chainknockers and grinder tips,
Its a great idea , but these manufacturers are going to go back to the drawing board and improve these products s they can really do what they were intended to do.
It will take a bit of time and money , but it will happen
And YES dont throw your rusty old cable drain machine away just yet guys. lol