I think it's possible to find an old hoover tube/handle that has a sliding flap on it and adapt that. The miele ones employ that technique. There are probably ready made pieces available from rutlands or similar. You could also build a system that collects the bulk of the dust before it hits the hoover.
I think it's possible to find an old hoover tube/handle that has a sliding flap on it and adapt that. The miele ones employ that technique. There are probably ready made pieces available from rutlands or similar. You could also build a system that collects the bulk of the dust before it hits the hoover.