Using six speed settings on gravel, borders and paving
Start lower than you think you need.
On gravel, the aim is to move the leaves without sending stones with them. A lower setting gives you more room to guide the airflow across the surface and see how easily the gravel moves. The same idea applies around bark, loose mulch and planted edges: move the leaf material first and avoid disturbing everything underneath it.
Around borders, leaves caught between plants may need a careful pass from the side rather than a direct blast into the bed. Increase the airflow one step at a time instead of jumping straight to turbo.
Paving is usually less delicate. Dry leaves often move at a moderate setting, while damp leaves can need more force to break free. Once they are loose, you can reduce the speed again and steer them towards the area where you want to vacuum.
If most of your work is quick blowing rather than collection, a compact 40V blower may be the simpler tool. The GD40BV makes more sense when you want the same machine to finish the job by vacuuming the leaves as well.
Why shredding tougher leaves before leafmould can help
The vacuum side of the GD40BV collects into a 45L bag and mulches at a stated 10:1 ratio. That reduces the bulk before you empty the bag. Some of the collected material can also be useful in the garden.
The RHS advises shredding thick leaves such as sycamore, walnut, horse chestnut and sweet chestnut before adding them to a leafmould pile because they break down more slowly. Shredding gives tougher material a better starting point before it goes into the pile. You can therefore collect the leaves, reduce their volume and keep suitable material for leafmould instead of treating everything as waste.
Sort out litter, stones and unsuitable debris before vacuuming. The mulcher is there for leaf material, not for whatever happens to be lying on the path.
If you prefer a blower-only format for regular garden clearing, the 40V Gen II blower gives you another route within the same branch.
280 km/h turbo versus lower settings for dry leaves, damp leaves and clippings
Turbo is useful because some debris really does need a harder push. It is not useful because every job should be done at 280 km/h.
For dry leaves on paving, start at a middle setting and raise it only if they are not moving cleanly. Grass clippings are also light, so too much airflow can spread them beyond the area you are clearing.
Damp leaves are where turbo becomes more relevant. If they are stuck to a hard surface or packed into a heavier patch, use the extra output to loosen them. Once the patch is moving, step the speed back down and regain control.
Near borders and loose surfaces, use enough air to move the debris without disturbing the surface underneath. Independent blower guidance similarly recommends lower output around delicate areas and stronger settings for hard-to-shift wet leaves.
If stubborn wet debris is a regular problem and you want to compare a higher-output option, the dual-battery high-performance blower/vacuum is the relevant step across. For a lighter blowing-only setup, the 40V blower kit option gives you a different balance of functions.
Build a mixed-surface clearing sequence from delicate areas to open ground
A useful way to clear a mixed garden is to work from the places where control matters most towards the places where you have more room.
Begin around borders, gravel and furniture at a lower setting. Move the leaves out of those areas and onto paving or open lawn. Increase the speed only when the surface becomes less sensitive or the leaves become harder to shift.
Keep vacuuming until later. Once the loose material has been moved out of the delicate areas, build a few reachable piles on open ground. Then switch functions and collect them into the 45L bag.
This reduces the chance of scattering stones or blowing soil onto a cleared path, while leaving the leaves where the vacuum tube can reach them easily.
If you want a 40V blower supplied as a fuller battery package instead of a blower/vacuum, the 40V Gen II battery kit is another approved route.
The strength of the GD40BV is not that 280 km/h is always available. It is that you do not have to use it all the time. Six settings, turbo, vacuuming and mulching let you treat gravel, borders, paving and open lawn as different parts of the same garden.