I guess I'm tired, because yea, as far as I know, they are the same tube size so the 570 end tube should work. I just thought I'd mention it so that you wouldn't have to keep swapping tube ends. The one on the 570 seems to work well for all conditions. I wouldn't want to use that two handed deal either. At the end of the day I think I'd have the constant feeling of leaning towards the left from fighting that thing.
You need a 3 pt blower for your 855 for your trails. Then you could blow the leaves off the trail, into and on through the woods and onto your irritating neighbors property