Mine seems to be unable to hold a hill going downhill. I lose total traction when I am headed downhill, especially a side hill. Does this happen on all Z turns or did I buy one that doesnt work well on hills. It climbs and turns up hills no problem but going down straight or turning it looses traction and I just have to ride it out a little bit. I went into a fence today but was able to get out without a problem, fortunately the fence gave a little and cause almost no damage to the machine or the fence. Could I get a setup to get more weight over the back tires????? Anyone have any comments?