I had two failures at first. Possibly my Ender 3 Pro had an issue because it is a fairly tall print with a small footprint. Anyway, after the first failure with no bed adhesion support at all I tried a skirt. This too failed late in the print. For my third attempt I used a raft and like magic it worked as you can see from the gray (Dikale PLA) pictures above. My second is on the build plate now about 3/4 done. It does not require any other support other than bed adhesion (at least not on my Ender). Great model, thanks. Both made for a friend as I don't ride.