On Sun, 3 Feb 2019 23:18:28 +0000, ss wrote:

Seem expensive compared to a convetional set of rods & brush.

Conventional rods and brush won't go past an elbow, as the OP stated.

Can't see spinning it with a drill adding that much compared
with manual manipulation.

Makes the relatively floppy "bristles" spin out to reach the sides of
the flue.

I see in the reviews one had it come apart inside the
chimney.......Ouch!

Operator error. Didn't make sure that all the joints had properly
latched before shoving it up the chimney. The fact that he had to
then modify the latches to make them work reliably is more telling.

I'd also want a good quality all round crimp between the metal end
and rod, possibly even a rivet passing through the sleeve and rod
end. Some of the end to rod connections on some of those on Amazon
don't look very good to me.

--
Cheers
Dave.