Tonight when I was out mowing and was playing around a little on our
BX25D on our slopes and found the following.
I had the Mid mount mower and my Cyclone rake hooked to the machine (not sure what the rake weighs but it had at LEAST 1 foot of grass clippings in it and it is the 10hp (largest) model so at least a few 100 pounds)
On the flat in low if I left off I would stop pretty much instantly but maybe move up to 6" if I left off the pedal slowly and not just pulled my foot up.
On 10-15 degree it would creep down the hill Very slowly but little back pressure on the HST pedal or the brake would stop it.
I went to a little over 20 degrees and had basically the same results.
I jumped on my larger MX and went on the 20ish degree slope and stopped (Loader on but nothing in it, no trailer or anything on the 3pt, it has a 3 range HST tranny and I was in Medium - my normal working gear) and it did stop but then slowly started to inch downward - I had to apply the brake or hit the HST pedal slightly backward to totally stop the movement.
Anyway just wanted to give everyone an example of how our BX behaves so they can decide if theres is the same or different. By no means do I feel it is dangerous to operate or a threat to my or my families health. Actually my 14 year old commonly uses it and never so much as bumped into anything or had any issues in our case.
Hope this helps....