Have any of you used this mower on brushier, hillier terrain? I have a 20 acre parcel, with a lot of small <=1" brush, plus some bigger stuff (2") some in thick clumps. Ideally I'd like to be able to cut that with the mower, but if worse comes to worse I can chainsaw the big stuff first. Will the flail "mulch" stuff this big if it were cut first? Do they work reasonably well over uneven ground? I'd think they would still be better than a rotary. I also have a lot of rocks...I'll try to avoid them but I'm sure some will get hit. I can't imagine this is good for the flails, but then again, it seems like small flails would be less drama than hitting rocks with a rotary.