Our Ultimaker is having some issues these days and seems to like to air print and disappoint us. *cry*. This print got about 40% of the way and it is indeed flexy! When I stop being upset at the ol' machine, I will attempt another Flexy Rex. Anyhow, this print is at 150% of the original size and the flexy bit looks like it would have held together really well. 150% makes Flexy Rex look pretty skeletal though 'cuz the gaps become bigger with the upscale. Still, pretty cool!