All the driveways that I deal with are flat, so some of this is opinion only.
That rear blade with its offsetting capability has some serious advantages with snow removal on that steep driveway. Using the blower and the blade angled at the same time when going down hill should clear the snow down to dirt if some weight is added to the blade. Going uphill with the blade in carry position should give sufficient traction to use the blower, given enough horsepower to operate the blower with half a cut and climb the hill at the same time. Using the back blade while going up hill may be an option with enough weight in and on the rear tires. Successive down hill passes with the blade offset to scrape the previous uphill pass and angled to make the windrow towards the working side will mark the edge of the next blower pass.
Unfortunately, this means re-angling the blade on each pass, unless you start in the middle and work to the edges. Think seriously about adding hydraulic angling and offsetting to the list of add-ons for the rear blade.
With experimenting and experience, I think it would be a great combination! I've used the blower/backblade setup in a similar fashion and have used a FEL/back blade in a like manner for many years, but my back blade doesn't have the offset function.
That rear blade with its offsetting capability has some serious advantages with snow removal on that steep driveway. Using the blower and the blade angled at the same time when going down hill should clear the snow down to dirt if some weight is added to the blade. Going uphill with the blade in carry position should give sufficient traction to use the blower, given enough horsepower to operate the blower with half a cut and climb the hill at the same time. Using the back blade while going up hill may be an option with enough weight in and on the rear tires. Successive down hill passes with the blade offset to scrape the previous uphill pass and angled to make the windrow towards the working side will mark the edge of the next blower pass.
Unfortunately, this means re-angling the blade on each pass, unless you start in the middle and work to the edges. Think seriously about adding hydraulic angling and offsetting to the list of add-ons for the rear blade.
With experimenting and experience, I think it would be a great combination! I've used the blower/backblade setup in a similar fashion and have used a FEL/back blade in a like manner for many years, but my back blade doesn't have the offset function.