On 11/9/2016 2:19 PM, Carl Ijames wrote:

... "duct hose" ...

I had an experience with duct hose. I built a leaf vac and tried a
variety of scrounged hoses on it. The very poorest performer was duct
hose. It lasted about 20 minutes before the leaves, twigs, & bits of
this and that wore through the wall.

I was cheap, but eventually I did buy the real stuff ($7 a foot, IIRC)
and it was worth it - after 10 or 15 years it is still in use, but has a
few tears.

Bob