Ken,
For an economical version of the snow pusher, this is probably OK. As a point of clarification, I do NOT plow any gravel surfaces as we don't have any around our area. I tried to be as objective in both the pro's and con's as I could.
From someone who plows A LOT of snow in residential driveways, here is my take on the "bucket wings. I Just plowed for 4 hours again today, another 17 driveways of every shape, size all concrete and asphalt. I have plowed snow for 35 hours already this season. So, I get and have a lot of experience plowing snow, especially in residential driveways in my area.............
While some may have differing opinions, from doing this on a variety of of driveways and dealing with the real world complications, here are my thoughts from my experience of residential driveway plowing over 20 years, using various equipment.
Positives
1. Makes the bucket more of a multi use tool. Buckets alone to plow snow are painfully slow.
2. Adds pushing width that takes the bucket from 50" to 84". This is a huge issue.
3. Gives you "Snow Pushing" capabilities for $500, which is much less than the cost of a dedicated snow pusher, roughly $1,500.
4. Allows you to push snow without being limited to the bucket capacity and having clean up trails everywhere.
5. Permits you to move snow without spending the money for a front quick attach hitch and 54" plow.
6. Gives the snow pusher the advantages of a V Plow and allows you to "scoop" the snow for pushing. However, unlike a V Plow, this is the ONLY way this item on your bucket allows you to push the snow. You can't angle it, etc.
7. Prevents having the $1,500 tied up in a dedicated snow pusher that is used seasonally and can be very weather dependent.
Negatives
1. Eliminates the ability to back drag, which is an essential function in plowing residential driveways (unless you like to hand shovel). Of the 17 residential driveways I plow the ONLY one I don't back drag is my own drive because I designed it and the landscaping for scraping and pushing to the edge in every direction. Other driveways require me to back drag, some of the extensively.
2. If you catch an edge of the bucket on an uneven surface,such as heaved concrete, you are wrecking either the surface, the bucket and maybe yourself. It's going to happen.......it's part of the game of plowing residential driveways.
3. Wet heavy snow will fill the bucket and be harder to "empty" plus stick to the wings, adding a lot of weight.
4. When number 3 happens, You can't tip the front of the bucket down and bang the bucket on the surface to clean it out as the wings are out front and will be bent.
5. Needs a top flap or snow accumulated out front of the unit starts to come over the top of the bucket and eventually the wings. Even in the video, this becomes an issue. With light fluffy snow, it's a reality as the weight of the snow won't stop you before the snow needing additional clean up will.
6. When you are straight pushing everything, you end up with piles all over the place when you reach your pushing limit. You will have to push off the surface and likely into the lawn often at 15 degree angles.
7. When you push onto a lawn, you will likely tear up either the grass or other with the bucket edge. This is a big problem.
8. The bucket edge isn't ideal for scraping the pavement, unless you put some type of rubber or composite "edge" on the bottom of the bucket edge to protect the surface.
9. Changes in contour on the surface, for example transitions from the road to driveways and back due to drain curbing will leave the bucket leading edge very likely to damage the surface and the heights change. Even floating the bucket leaves the sharp leading edge of the bucket very likely to damage either the driveway, the road or in reality, both depending upon the direction of the push.
10. Without being able to trip the snow removal scraping edge, you better wear your seat belt because unforeseen and unplanned stops will be very abrupt.
11. Leaves the bucket with a bunch of holes in when the wings are removed.....
12. Anytime you are going over snow and not scraping it to the surface with a rubber edge or composite edge, you are packing down the snow and making it very likely to become icy. It's the same way the blower does it. Packing down the wet snow over time, it makes the surface very dangerous for walking, etc. Using this approach will require more snow melt be applied since you can't clean the surface completely. This occurs in the video of him pushing snow with the wings. I need to get the surface cleaned or the ice on these driveway grades makes everything much more dangerous than it should be.
Bottom line, I am not a fan of this approach and I can't see the bucket wings working unless you are in the same position as the guy who invented them. You are clearing a driveway and it's not paved and you don't care about cleaning it to the surface. .........................