Will happily take any advice on printing flexible filament. I bought some Rigid.Ink Flexible PLA. Totally bendy stuff on the reel, quite a departure from ABS/PLA/XT/PETG/nGen. For reference I tried printing 3 models so far, all with . All printing directly onto clean glass at 210 nozzle, 100 bed. So far, none of them have any lifting issues, but there's not models that would generate stresses. I'm trying to print tyres and belts just for the fun of getting some experience with flexible filament. One issue I did have was that my first tyre stopped printing at some point on about layer 3 and I looked up at the extruder to see a real mess. The filament had basically stopped being pushed into the tube down to the hot end and was just getting mushed up around the hobbed gear. I think this could have been the result of regular and rapid retraction just over stretching the filament in place. So I turned off retraction completely, which creates it's own issues, but I'm curious if other people found they needed to tweak retraction speed at all with flexibles.