I actually only received messages from other people saying they printed in TPU, i don't tend to use TPU myself because I run everything through AMS for convenience. However from past experience using TPU, the best advice I can give would be to slow the print down to extremely slow speed, like half of what your used too, detail with TPU would need to be as accurate as possible for the latch to work. Out of curiosity, what printer are you using and which filament brand? Thanks.