I am having issues getting ninja flex to feed. Semi-Flex is a little better but not much. When I load the filament it seems (at least to me) that it extrudes slower than than ABS or PLA does. I took a video of it so you can see if I am nuts or not. The hotend temp is set to 230. I tried this thingiverse mod but it did not work for me. http://www.thingiverse.com/thing:857200

My question is: what can I do to get this to print flexible filaments reliably ? What do you do to run flexible filaments? I bought this printer because it advertised that it can run flexible filaments. I contacted Mr. Tang but he said he does not use flexible filaments.

https://youtu.be/ie5DEcihR9k
https://youtu.be/hPTtZ8q1BcE