This thread was helpful to me in my search for a soft case, so I thought I would share my end result. I bought a Bayan2 pro case from
AMC Music through a seller on eBay. It cost about what a Fuselli case would.
It has has about 15-20 mm padding, two sets of feet and handles, and backpack straps
with load adjusters. This alone makes them the most serious straps for carrying a 20+ pound instrument on my back, in my opinion. The other thing I liked was the very snug fit of the case for my Tula 61 key bayan. It is exactly the right size in 2 of the 3 rectilinear dimensions. I expect it would exactly fit a 5 row bayan of the same type. They make this case in 8 different sizes.
I live a 5 minute drive in the city from my bayan teacher, so I intend to walk to lessons when the weather cooperates.